I've been busy with the sounds mod, made a new decent music file that plays during the menus, but the other sounds I made : .ogg and .wav for the speech and the submarine sounds make the game CTD

when the music file alone is fine ?
ok so it causes CTD when loaded up, the music files are ok and don't cause ctds, but the .wav I made to replace the current submarine sounds and the .ogg for the speech seem to cause CTD on my computer.
any help with this appreciated, those are genuine I-boat sounds from a propaganda movie shot during I-10 's 5th war patrol.
are there different types of .wav or .ogg like there are of .jpg ??????
keltos
CTD version of mod :
http://files.filefront.com/IJN+sound.../fileinfo.html