Only Some Notes Played from Chord (Memory-Intensive Patch)

I have a commercial soundbank called "CFA-Thrillogy Vol. 1".

All patches from that bank, when played in a chord (i.e. 3+ notes), seem to randomly "break" and play only 1 note every other place.

For example: my piano roll has this arrangement:
[Blockierte Grafik: http://i48.tinypic.com/35k2ux1.jpg]

But this is the result with the patch "Detuned" from that bank: note that some chords randomly play one note.
http://www8.zippyshare.com/v/88822755/file.html

I'm noticing that the "Battery Meter" lights up as my Virus is 4/4. Is this problem? If yes how do I resolve it? Thanks.

thanks I'll look at the Unison there.