have you put the game into the virtual drive? do you have the dreamcast bios? if not go to downloads and get the tutorial. also check whether the game is compatible, if not, then theres not much you can do at the moment, its only in its BETA stages.
oh and pls don't post the same topic twice, it makes people not want to help you, and i think theres a rule about that as well. anyway, hope i helped!