Hmm. o_O Well, lessie here...
Last thing I could think of, might be missing a Codec that plays the audio... (Unless, for some strange reason NTY! doesn't have VA'ing... I dunno. XD;;; )
A good thing to do is to update audio codec's using the CCCP ( CCCP - Combined Community Codec Pack ). Give that a shot. Other than that, maybe the audio file is bunk? Not sure... Sorry.