I have tried MegaMAMECE3 on my e740 with three ROMs; Frogger, Mortal Kombat, and X-Men (4-Player). All three play on the PC. On the PDA, when I try to play them, the screen blanks (except for the start button/bar at the top), and then returns to the MAMECE3 list of games. I have not changed any of the options; what could the issue be here?