Hello guys. Yesterday i installed Backtrack 5. After 5-10 minutes from a boot up, backtrack freezes. I've searched a little and i found that it was a problem with the drivers of ATI so i downloaded ATI 11.6 and i installed it from the run file. Now some of the effects doesn't work such as blur, wobbly windows, fall apart and others. I have Mobility Radeon 4650 and Backtrack 5 KDE. Does anyone know how to fix this?