Issue with Midi play back

[SeeGhost]

Hi I have had my Virus for about 6 months an I absolutely love the thing.

When I was using USB L+R mode I notice a huge bottleneck occuring when layering multiple sounds, started to introduce pops and glitches in USB mode,
Plus when playing on my novation Midi controller the midi notes were out of time during strinking the notes. But in the Cubase sequencer playing back the notes from a midi files was fine no delays there what so ever.

So I decided to ditch the USB connection for Audio and go direct through Analogue outputs 1+2, that works an absolute treat except for one slight problem, now the midi notes in Cubase play back all evenly out of time, about 1/4 notes behind.

does anyone now why this happens?? I tried to mess around with the Sync setup option in cubase and messed around with the Ti settings but its not working at all.

Also bare in mind that when I actually play notes from my midi controller the response is fantastic !! no issues. But when laying down the midi tracks and then listening during play back you can hear the notes slight out, Any suggestions

Thanks heaps !