- Did you install MCPatcher?
- Are you running the correct version of Minecraft? (Currently, 1.6.2)
- Have you tried redownload the pack or repatching MCPatcher?
- Is the pack in the /resourcepack/ folder?
- Did you use Optifine even though I told you not to?
- Are you using any other mods that may be conflicting with MCPatcher?
- All else fails, have you tried to reinstall Minecraft and then repatch MCPatcher?