Ok, this is frustrating me now.

I have the newest version of mamewah, I've made my layout, set up my rom and art directories. Everything looks beautiful. The list of games is happy. I try to start a game and *wham*
run-time error 75: file/path access error
ok, I checked the rom directory & emulator directory - both fine
c:\mame\roms
c:\mame\mame.exe
I tried running the games from the command line - working fine. So downloaded mame .77 and everything still worked. Mame32 also worked.
Really, I am stumped. I've been through the cfg files a ton of times. I have stuzza's guide printed - its great for basic setup but doesn't have many tboubleshooting tips.
What we need is a table that has the error number/messages and possible solutions to those problems. At any rate, anyone have any ideas about thie error 75?