trees

i have the mz-rh910 model and sonic stage 3.0.00, etc. i have been transferring live recordings (done with the apex mini-mic) to sonic stage and then burning them w/ simpleburner for a bit, and thought that i had gotten the hang of it. now, tho, i'm stumped. when i try to transfer specific tracks to my library, the transfer gets to the 67% level, stops, then says that an internal access error has occured-- the player itself flashes the words 'access error.' but these tracks will play without any problems through my computer (not transferred yet) and on the player itself. so what's the deal? can i do anything about this?