Hmm.. dunno what to say.. I have the demo myself but haven't transferred it yet to my PSP.. I'll let you know how mine goes..

----Added 18/12/2009 at 6:24 PM----
Oh.. Also, did you install 5.50 GEN-D3 the Final version... Team GEN released an update coz the first one was still buggy.. So maybe that's the case..