What version of GameEx are you using? Has it ever worked for you? I had some problems like you where the log file didn't really tell me what was going wrong. This was because with my setup it had to do with 5.23. Once I upgraded to 5.24 then everything was groovy. A few other questions: Are you using mapped drives for your Roms? Are you running on a secondary monitor? Are you playing on a HDTV? After you have set all the proper settings to guide GameEx to all of your Emu's, Rom's, Snaps's, and ect. then I would suggst that you open up Mame32 without GameEx and set all the setting that you would like to use. This would include resolutions, arcade sticks, sound properties, and whatever else you would like to set. I don't know if this method is the way that Mr. Speirs suggests but it seems to work great.