OPINION

J. HARVEY HUDSON, Justice.

Appellant, Andrew Knight, was convicted on his guilty plea for aggravated sexual assault of a child. Pursuant to appellant's plea agreement with the State, the trial court placed appellant on deferred adjudication probation for a period of ten years. On April 24, 2002, the State moved to adjudicate appellant's guilt. On June 7, 2002, the trial court adjudicated appellant guilty and sentenced him to twenty-five years' confinement in the Institutional Division of the Texas Department of Corrections. We affirm, in part, and dismiss, in part. In his first issue, appellant claims the trial court erred in failing to determine whether he was competent to stand trial when it accepted his original guilty plea. A defendant placed on deferred adjudication must appeal issues relating to the original plea proceeding when deferred adjudication is first imposed and cannot appeal such matters after guilt has been adjudicated. Vidaurri v. State, 49 S.W.3d 880, 884 (Tex.Crim.App. 2001); Daniels v. State, 30 S.W.3d 407, 408 (Tex.Crim.App. 2000); Manuel v. State, 994 S.W.2d 658, 661-62 (Tex.Crim.App. 1999). Because appellant cannot now complain of alleged error in the plea process, his first issue is dismissed for lack of jurisdiction. In his second issue, appellant asserts the trial court erred in hearing evidence on the State's motion to adjudicate without taking his formal plea in violation of his due process rights. A defendant whose deferred adjudication has been revoked and who has been adjudicated guilty of the original charge may not complain of error in the adjudication of guilt on appeal. TEX. CODE CRIM. PROC. ANN. art 42.12, § 5(b) (Vernon Supp. 2003); Rodriquez v. State, 992 S.W.2d 483, 484 (Tex.Crim.App. 1999); Connolly v. State, 983 S.W.2d 738, 741 (Tex.Crim.App. 1999). Because we lack jurisdiction, appellant's second issue is dismissed. In his third and fourth issues, appellant contends his sentence of twenty-five years' confinement is cruel and unusual punishment. The State argues we lack jurisdiction over this complaint because appellant failed to satisfy the notice requirements of Texas Rule of Appellate Procedure 25.2(b)(3). TEX. R. APP. P. 25.2(b)(3). To invoke an appellate court's jurisdiction over an appeal, a defendant must file a proper notice of appeal. Woods v. State, 68 S.W.3d 667, 669 (Tex.Crim. App. 2002). In an appeal from a judgment rendered on a negotiated plea, the notice of appeal must: (1) specify that the appeal is for a jurisdictional defect; (2) specify that the substance of the appeal was raised by written motion and ruled on before trial; or (3) state that the trial court granted permission to appeal. TEX. R. APP. 25.2(b)(3). Rule 25.2(b)(3)'s notice provisions apply to defendants who are placed on deferred adjudication probation. Woods, 68 S.W.3d at 669. A review of appellant's notice of appeal shows that it does not comply with Rule 25.2(b)(3). However, when the appellant raises an issue on appeal unrelated to his conviction, Rule 25.2(b)(3) limitations do not apply. See Vidaurri, 49 S.W.3d at 885 (holding Rule 25.2(b)(3) limitations do not apply to appellant's complaint that he was deprived of separate punishment hearing). Here, appellant complains his sentence of twenty-five years' incarceration is cruel and unusual punishment — an issue unrelated to his conviction. Therefore, we have jurisdiction over this complaint. Appellant failed to raise this complaint in the trial court, thereby waiving this issue on appeal. TEX. R. APP. P. 33.1; Curry v. State, 910 S.W.3d 490, 497 (Tex.Crim.App. 1995). In any event, we do not find that appellant's sentence constitutes cruel and unusual punishment. If the punishment assessed is within the statutorily prescribed limits, it is not cruel and unusual punishment. Cooks v. State, 5 S.W.3d 292, 298 (Tex.App.-Houston [14th Dist.] 1999, no pet.). Aggravated sexual assault of a child is a first degree felony. TEX. PENAL. CODE ANN. § 22.021 (Vernon 2003). The punishment range for a first degree felony is imprisonment for five to 99 years, or life, and assessment of a fine up to $10,000. TEX. PENAL. CODE ANN. § 12.32 (Vernon 2003). The trial court assessed appellant's punishment at 25 years' imprisonment, with no fine — well below the maximum punishment. Appellant's third and fourth issues are overruled. Appellant's first and second issues are dismissed for lack of jurisdiction, and the judgment of the trial court is affirmed as to appellant's third and fourth issues.