Spencer Bowens, a federal prisoner, seeks to appeal the district court’s order construing his Fed.R.Civ.P. 60(b) motion and alternative request for a writ of coram nobis as an unauthorized successive motion filed under 28 U.S.C. § 2255 (2000), and dismissing for lack of jurisdiction. The order is not appealable unless a circuit justice or judge issues a certificate of appealability. 28 U.S.C. § 2253(c)(1) (2000); Reid v. Angelone, 369 F.3d 363, 369 (4th Cir.2004). A certificate of appealability will not issue for claims addressed by a district court absent “a substantial showing of the denial of a constitutional right.” 28 U.S.C. § 2253(c)(2) (2000). A prisoner satisfies this standard by demonstrating that reasonable jurists would find both that the district court’s assessment of his constitutional claims is debatable or' wrong and that any dispositive procedural rulings by the district court are also debatable or wrong. See Miller-El v. Cockrell, 537 U.S. 322, 336, 123 S.Ct. 1029, 154 L.Ed.2d 931 (2003); Slack v. McDaniel, 529 U.S. 473, 484, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000); Rose v. Lee, 252 F.3d 676, 683 (4th Cir.2001). We have independently reviewed the record and conclude that Bow-ens has not made the requisite showing. Accordingly, we deny a certificate of appealability and dismiss the appeal.
Additionally, we construe Bowens’s notice of appeal and informal brief on appeal as an application to file a second or successive motion under 28 U.S.C. § 2255. See United States v. Winestock, 340 F.3d 200, 208 (4th Cir.2003). In order to obtain authorization to file a successive § 2255 motion, a prisoner must assert claims based on either: (1) a new rule of constitutional law, previously unavailable, made retroactive by the Supreme Court to cases on collateral review; or (2) newly discovered evidence that would be sufficient to establish by clear and convincing evidence that no reasonable factfinder would have found the petitioner guilty of the offense. 28 U.S.C. §§ 2244(b)(2), 2255 (2000). Bowens’s claims do not satisfy either of these conditions. We therefore deny authorization to file a successive § 2255 motion. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials be*249fore the court and argument would not aid the decisional process.
DISMISSED.