I'm sorry to disturb you, i usually solve problems by myself, but this time i'm really getting mad solving this one.

I've just installed Backtrack 4 Final and everything is working fine, everything except the audio.
I'd like to solve this problem with your help.
This is what I get if i type: lspci |grep Audio
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
01:00.1 Audio device: ATI Technologies Inc RV710/730

When I try to access to audio peripherals i get this error: libGL.so.1: cannot open shared object file: No such file or directories.
But the file is located in /usr/lib/libGL.so.1, it seems to be empty and if i open it i get the following screen:

An error occurred while loading file:///usr/lib/libGL.so.1:
The file or folder /usr/lib/libGL.so.1 does not exist.

Hope you will help me

-Thank you