Wow. This is a complicated setup. I even deleted all your setup and copied from the grab.blend file! And that didn’t work! Have you posted on the guy’s thread that made this setup?
Hmm sorry if I missed topic. Complicated I want simpply FPS (move, mouselook, jump) and simply grab system. May not be the one grab.blend file I joined me. For example: http://www.youtube.com/watch?v=0V99gYhOVCc
may change my script for move and mouselook, to work drag and drop system. Oh my english. Sorry