unable to play xvid audio

I have just installed latest version of BSplayer in WXP, and am unable to play xvid sound.

I am sure this is the most basic of questions, but I can find nothing to the point in the install instructions on this site. Just this:

"filters defined in bspfilters.dat will now be loaded even if other libraries are required (for ex. xvid.ax require xvidcore.dll), just put them all in .\filters directory"

there is neither a bspfilters.dat nor a .\filters directory in the BSplayer program file - so how am I to understand this istruction??

would someone be kind enough to enlighten a novice user