James Edward Deaver, federal prisoner # 91858-080, appeals the dismissal of his 28 U.S.C. § 1651(a) petition. Deaver claims that the denial of his § 1651(a) petition was error, arguing that such a petition is the only remedy available to him to seek invalidation of his unjust sentence for conspiracy to possess with intent to distribute amphetamine. As he attacks the validity of his sentence, his claim arises under § 2255, thus relief under the All Writs Act is unavailable to him. See Carlisle v. United States, 517 U.S. 416, 429, 116 S.Ct. 1460, 134 L.Ed.2d 613 (1996); see also Tolliver v. Dobre, 211 F.3d 876, 877 (5th Cir. 2000). The district court properly dismissed the petition because we did not authorize the filing of a successive § 2255 motion. Accordingly, the appeal is frivolous, and it is dismissed. See Howard v. King, 707 F.2d 215, 220 (5th Cir. 1983); 5th Cm. R. 42.2.