Slim Phatty Glitching.

Ok, so ive had my slim phatty for a month now.

the SP rocks, but it always stops working after like 10-20 minutes!!!

it seems like its fine, then when i start moving knobs around, all the knobs values go to zero and i have to restart and lose my sounds

im running 3.1

chain is:
SP->duet->Logic Pro

Midi:
Maschine direct

2 keyboards by usb