Hi LC, Thanks for your reply and warm welcome! I gave updating MC a try, There was an update available but I'm still facing the same problem. When I first installed GameEx at home, I set it up with MAME + 7 or 8 other emulators so just incase I did something wrong, Last night I wiped everything and stated again only this time I only setup MAME but it's still the same. I have no idea whats wrong. It's actually a Windows 7 Home Premium install, as I said, it works perfectly on my XP machine at the office. The home PC is 64bit if that makes any difference? Anyway, I'll keep trying as I really like the look of this front end and plan on getting the full version..... if I can get it working ofcourse! Cheers, Paul.