virus ti playback problem
 

Hi everyone i m new on this forum and also a new virus user .
I have a problem with my virus TI DESKTOP it won t play back all the midi notes in cubase 5
I m running from the virus 7-8 sounds (synths bass etc..) and one of them just plays back only one note from a chords until i Solo the track that s when the virus it s playing back as it should
My setup is quad pc 4 gigs of ram WIN XP 32 bit ..m-audio soundcard (256 samples-tryed higher and lover also didn t helped) cubase 5 -TIOS 3.2.7 any help would be appreciated
Best regards Adam!!!