SC:Chaos Theory - Sound Loop Problem

[fearwhatnow]

Game installed and applied patch 1.05.using the fixed exe to play without the dvd on.The problem is that after several minutes on gameplay the sound loops fast forward.it is like SC:Looney Tunes Theory..Having all the updated drivers for graphic card and sound card the problem still continues.Tried everything!Reduced sound hardware accelaration,opened SC engine settings and reduced maximum sound channels and voices..Still nothing!problem exists and without fixed exe and playing from the original dvd.Anyone?appreciate your help here!System specs:athlon 2400+,geforce ti 4200,512Mb ram under XP.