Make sure you use the latest version of fairuse4wm, namely
fu4m 1.3 fix-2 .
You might need to downgrade your Windows Media Player.
You can also install Windows XP onto a virtual machine like VMWare and MS Virtual PC.
Please be more specific in your requests: describe what you do and what errors you have.
Related threads:
Removing Windows Media DRM on Windows Vista. Need better instructions!
Help to remove DRM on Windows Vista