[Adrynalyne]

Try going into setings, connections, USB to PC and uncheck the advanced option in there.

I should note that I had this problem recently, and it was the product of me using reghacks. The hacks themselves werent bad, but I had converted them to cab format, and for whatever reason, it messed up my Omnia all to hell. So if you installed something similar, like the one I posted, remove it.