When I enabled the betabrite, I get that error on the latest release. I checked my com settings and they match, so I don't know what's going on. ???
Well, with the help of google, I think that my problem goes back to when I had an ELO touchscreen hooked up through the comm port. When I get moving later, I'll try and uninstall the ELO drivers and see if that fixes it. The answer was in the original thread at byoac the whole time. :-\
http://forum.arcadecontrols.com/index.php?topic=39432.msg627334#msg627334 (http://forum.arcadecontrols.com/index.php?topic=39432.msg627334#msg627334)
Ah they must have somehow bound to the com port.... Glad you found it cause that could have driven me crazy trying to sort it out.