Thank you for the fix Scanti!
For the blocky texture, you can use what I've done previously if you want. (http://img829.imageshack.us/img829/7166/cmdlcsuitdkrsp.png)
It's ok in fact, I found the problem, this is not DXT1 as I said, but DXT5 compression, that's why that crash the game. Failed ! =D