The method Redfox mentions worked just fine for me on my SAM 440. IIRC, it comes down to a MUI issue going from u2 to u3 if you've installed some of the extra apps. I had the exact same thing happen when going from u2 to u3, SAM 440ep.
Takemehomegrandma, the guy was asking for assistance, not MorphOS propaganda. To each his own, you know? Not sure why some people need to constantly troll other peoples threads with red vs. blue nonsense.