*373 Affirmed by unpublished PER CURIAM opinion.

Unpublished opinions are not binding precedent in this circuit.

Gregory L. Walker appeals the district court’s order denying relief on his 28 U.S.C.A. § 2255 (West Supp. 2012) motion. Walker raised four claims in the district court but his sole issue on appeal is whether the district court should have retroactively applied the Supreme Court’s reasoning in Carachuri-Rosendo v. Holder, — U.S. —, 130 S.Ct. 2577, 177 L.Ed.2d 68 (2010), to analyze the validity of his predicate offenses relied upon for his career offender enhancement. We have recently determined that Carachuri-Rosendo claims may not be raised retroactively in collateral proceedings. See United States v. Powell, 691 F.3d 554 (4th Cir. 2012). Accordingly, we affirm. Because we confine our review on appeal to the issues raised in the Appellant’s brief, see 4th Cir. R. 34(b), and Walker’s informal brief does not challenge the remainder of the district court’s disposition, Walker has forfeited appellate review of the other issues decided in the district court’s order. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

AFFIRMED.