A1 Vernon Brown appeals his sentence imposed after pleading guilty to possession with intent to distribute 500 grams or more of cocaine hydrochloride, in violation of 21 U.S.C. § 841(a)(1) and (b)(l)(B)(ii). He asserts the district court: (1) erred in determining it could not consider, on remand, his argument that the prosecutor improperly induced him to plead guilty, and (2) violated his constitutional rights in sentencing him as a career offender in violation of Blakely v. Washington, 542 U.S. 296, 124 S.Ct. 2531, 159 L.Ed.2d 403 (2004) , and United States v. Booker,—U.S.-, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005) . We hold the district court did not err in determining it could not consider Brown’s argument that his guilty plea was improperly induced, but plainly erred in sentencing Brown under a mandatory Guidelines system. We reverse and remand for resentencing consistent with Booker.
I. BACKGROUND
Brown pled guilty to possession with intent to distribute 500 grams or more of cocaine hydrochloride. Prior to the sentencing hearing, Brown filed pro se motions to withdraw his guilty plea and to dismiss his court-appointed counsel, which the district court denied. During the sentencing hearing, the prosecutor noted there had been no discussion of the applicability of the career offender provision during Brown’s plea colloquy. The district court decided not to apply the enhancement because it had not been discussed. As a result, the district court sentenced Brown to 137 months’ imprisonment.
Brown appealed his conviction asserting the district court abused its discretion by denying his motions to withdraw his guilty plea and to dismiss his court-appointed attorney. The Government cross-appealed Brown’s sentence, arguing the district court erred by failing to sentence Brown as a career offender. This Court held the district court did not abuse its discretion in denying Brown’s motions to withdraw his guilty plea and to dismiss his attorney. In response to Brown’s argument that the Government had induced him to plead guilty by agreeing his sentence would be no more than five or six years, we held the record did not reflect such an agreement— the district court made clear that any numbers mentioned during the plea colloquy were just estimates and that many factors, including his criminal history, would be considered in determining his sentence. We further determined Brown met all the criteria for applying the career offender enhancement, and concluded the district comet’s failure to apply the enhancement was error because the plain language of the Guidelines required the district court to sentence Brown as a career offender. Thus, we affirmed Brown’s conviction, but vacated his sentence and remanded the case with instructions that *182the district court resentence Brown as a career offender with an offense level of 34, a criminal history category of VI, and a sentencing range of 262 to 327 months’ imprisonment.
On remand, Brown moved the district court to reconsider his motion to withdraw his guilty plea, arguing he was coerced into pleading guilty, and did not understand the consequences of his guilty plea with respect to the career offender enhancement. He asserted he was misled by the predictions of his attorney and the prosecutor as to the sentence he faced. Brown also objected to the career offender enhancement, arguing the Government failed to sufficiently prove the career offender enhancement applied.
The district court concluded, in light of this Court’s mandate, that it had no authority to grant Brown’s motions, and denied them. During the resentencing hearing, the district court indicated throughout the hearing that it had no discretion in applying the career offender provision, and stated: “I did feel the 137 months I gave you originally was a more appropriate sentence, but based on the instruction I’ve received from the Eleventh Circuit, it is my obligation to sentence you within the range of 262 to 327 months, so I’m going to sentence you to 262 months.”
II. DISCUSSION
A. Improper Inducement of Guilty Plea
Brown asserts prosecutors are required to inform a defendant who is pleading guilty that he is eligible for sentencing as a career offender and may face a sentence higher than the defendant’s counsel predicted. He also argues the law of the case doctrine did not bar the district court from considering the issue, and, alternatively, the district court could have addressed the issue under the manifest injustice exception to the doctrine and its inherent supervisory authority over matters occurring before it.
“A district court when acting under an appellate court’s mandate, cannot vary it, or examine it for any other purpose than execution; or give any further relief; or review it, even for apparent error, upon a matter decided on appeal; or intermeddle with it, further than to settle so much as has been remanded.” United States v. Tamayo, 80 F.3d 1514, 1520 (11th Cir. 1996) (quotations and citation omitted). “Our settled circuit law obligates a district court to follow our mandates, and not to assert jurisdiction over matters outside the scope of a limited mandate, which constitutes abuse of discretion.” Id. (internal citation omitted).
In our mandate, this Court specifically instructed the district court to sentence Brown as a career offender, indicating the applicable offense level, criminal history category, and Guidelines range. The district court was obligated to address only the issue presented by this Court’s mandate, see id., and it did not err in determining that it did not have the authority to entertain Brown’s argument that the prosecutor induced him to plead guilty.
B. BlaJcely/Booker
Brown contends the district court violated his constitutional rights in sentencing him as a career offender, in violation of the Supreme Court’s holdings in Blakely and Booker. We review this argument for plain error because Brown raised it for the first time in his initial brief on appeal. See United States v. Rodriguez, 398 F.3d 1291, 1298 (11th Cir.2005).
An appellate court may not correct an error the defendant failed to raise in the district court unless there is: (1) error, (2) that is plain, and (3) that affects substantial rights. If all three condi*183tions are met, an appellate court may then exercise its discretion to notice a forfeited error, but only if (4) the error seriously affects the fairness, integrity, or public reputation of judicial proceedings.
Id. (internal quotations and citation omitted). We have clarified there are two types of Booker error: (1) Sixth Amendment, or constitutional, error based upon sentencing enhancements, imposed under a mandatory Guidelines system, neither admitted by the defendant nor submitted to a jury and proven beyond a reasonable doubt; and (2) statutory error based upon sentencing under a mandatory Guidelines system. United States v. Shelton, 400 F.3d 1325, 1329-30 (11th Cir.2005).
1. Constitutional Error
A district court does not commit Booker constitutional error by relying on past convictions to enhance a defendant’s sentence. Shelton, 400 F.3d at 1329. Because Brown’s career offender enhancement is based on past convictions, there is no constitutional error.1
2. Statutory Error
Brown meets both the first and second prongs of plain-error review for statutory error because he was sentenced under a mandatory Guidelines system. See Shelton, 400 F.3d at 1330-31. Under the third prong of plain-error review, “we ask whether there is a reasonable probability of a different result if the [Guidelines had been applied in an advisory instead of binding fashion by the sentencing judge in this case.” Rodriguez, 398 F.3d at 1301. It is the defendant’s burden to show he meets this test. Id. at 1299.
Brown has met the burden of showing there is a reasonable probability of a different result if the Guidelines had been applied in an advisory fashion. During the resentencing hearing the district court stated several times it opposed enhancing Brown’s sentence, but believed it had no discretion in the matter as a result of this Court’s mandate. The district court specifically stated: “I did feel the 137 months I gave you originally was a more appropriate sentence, but based on the instruction I’ve received from the Eleventh Circuit, it is my obligation to sentence you within the range of 262 to 327 months, so I’m going to sentence you to 262 months.” The district judge’s comments establish a reasonable probability the district court would have imposed a more lenient sentence if it had applied the Guidelines in an advisory fashion. See United States v. Martinez, 407 F.3d 1170, 1174 (11th Cir.2005).
Brown also meets the fourth prong of plain-error review. “Because the district court expressed a clear desire to impose a more lenient sentence and Booker provides that the district court had the authority to *184consider the Guidelines as advisory, the plain error of applying the Guidelines in a mandatory fashion seriously affected the fairness, integrity or public reputation of [Brown’s] sentencing.” See id.
III. CONCLUSION
The district court did not err in determining it did not have the authority to entertain Brown’s argument that the prosecutor induced him to plead guilty. The district court, did, however, plainly err in treating the Guidelines as mandatory. Thus, we vacate and remand for resentencing in light of Booker. We note the district court correctly calculated Brown’s Guidelines range of 262 to 327 months’ imprisonment. See United States v. Crawford, 407 F.3d 1174, 1178-79 (11th Cir.2005) (stating after Booker, district courts must consult the Guidelines and “[t]his consultation requirement, at a minimum, obliges the district court to calculate correctly the sentencing range prescribed by the Guidelines”). Thus, on remand, the district court is required to sentence Brown according to Booker, considering the Guidelines advisory range of 262 to 327 months’ imprisonment and “other statutory concerns as well, see [18 U.S.C.] § 3553(a) (Supp.2004).” Booker, 125 S.Ct. at 757.2
AFFIRMED IN PART, VACATED AND REMANDED IN PART.