Can't copy my mp3 files to the Nokia 5130. Trying to drag & drop as described in manual, but it gives me either "Not enough memory" or "Unable to complete" even if I try to copy just one file. Why wouldn't it just copy as many files as it had room for, and then say "Out of memory" or similar notice? Copying mp3 files to the 5310 was easy, but no way to get them onto the 5130.