Where did youve downloaded GW mod?
Did you've Had the folder merging correctly, cause some of us forgot some folders during that merging...
I think the chances are that if you've done the above things correctly it hapend to you as to me a corrupted GW Download ...
If it is that, you'll have to download it again mate!
Don't trouble yoursellf , I've download it 3 times until get it right!