I tried changing the bar music but it just doesn't work at all now

the only difference is the file size.
heres the log:
FATAL ERROR
[error]Expression : ovi->channels==1
[error]Function : CSoundRender_Source::LoadWave
[error]File : E:\stalker\patch_1_0004\xrSound\SoundRender_Source _loader.cpp
[error]Line : 71
[error]Description : Invalid source num channels:
[error]Arguments : c:\program files\thq\s.t.a.l.k.e.r. - shadow of chernobyl\gamedata\sounds\characters_voice\scenari o\bar\radio_music\radio_music_1.ogg
stack trace:
Scheduler tried to update object bar_radio