Apogee Duet keeps disconnecting after update to Snow Leopard

I updated to Snow Leopard (10.6.8 ) yesterday and now for some reason my Apogee Duet sound card keeps disappearing and randomly disconnecting.... It then automatically switches to my screen display audio. Very annoying.

If i pull out the fire wire cable and reconnect, it temporarily comes back but then vanishes again without warning.

I doubt it's anything to do with the cable because I have been using it since 2010 without any problems until yesterday...

Any ideas on how to fix this? Please help!