First of all I think MameWah is a wonderful piece of software!
I have successfully configured version 1.5 on a couple machines with no problem. For some reason however I can't get it to work on the machine in my cabinet though. I can see all my games but when I try to launch any game I get an hourglass and then it just locks up. If I end task on MameWah (shows not responding in task manager) then MAME will open with the correct game but the resolution is off (because MameWah was shut down I'm sure). Everything works fine from the command line.
I've installed the system files (several times) and installed version 0.97, 1.5, and 1.51 all with the same result. The PC is running WinXP Pro (like my other machine). I've gone over the ini files so many times including deleting them. I feel like I must be missing something simple because it has worked so easily for me before.