Whenever I try to load a server up with the World of Minecraft wrapper, it stays gray and I get two errors:

Exception in thread "Thread-4" java.lang.UnsatisfiedLinkError: C:\Users\JoshC\minecraftclient\native\windows\lwjgl.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform

Exception in thread "main" java.lang.VerifyError: class CustomPlayer overrides final method tick.()V

I'm running 64-bit Windows 7 Ultimate with an Intel i7, so I'm not sure where it's getting the AMD bit from.

Thanks in advance.