Sonar 4 and Midiman uno problem.

I tried to sync the sonar 4P with a vs-1824 using an midiman uno, all was looking good until touch play, the vs was following the sync like slave very smooth BUT! the audio signal was distorted badly, I switch to midi from the Motu 828 mkII and had a different problem, the sound was normal at the first and second bar but at third and fourth was very low of level, I tried to uninstall the uno drivers and reinstall but it's making the same, now I'm little confused, I can sync but the audio signal is poor. ( I'm using the vs to record some tracks from Vsampler one by one for mobile recordings) any ideas???? or anyone with possible solution???

My DAW:
AMD 64 Dual Core 4800+
2 Gb Memory
Sonar 3 and 4 (no updates)
Motu 828 mkII
Midiman uno