I've had this problem in the past. I can't remember how I fixed it before. But I have had it working. I've been trying to fix it all day, and I'm about ready to rip my hair out. I'm using mamewah 0.97 since getting mamewah 1.65 working is also a joke. I recently updated my mame romset to 1.35. The full names worked in mamewah before I went about updating my romset. I've tried dat files, every setting you can think of in mamewah, and more. But It will not work. Some one please help me out before I go crazy.