bsplayer somtimes freezes

hi...im having a problem with bsplayer
when i play an xvid...the first one or two clips that i view would be ok..everything works fine but if i stop the current clip and open another one...bsplayer freezes....so does my whole computer.
im running pIII 500 mhz with 400mb ram
ive tried running only bsplayer while all other programs are close
does anyone else have this problem?
can anyone suggest what settings i would have to change in bsplayer?
thanks