I'm having the same issue as the OP describes. Maxmius simply will not respond to any keyboard input at all. Not from the keyboard or the buttons/sticks on my panel. I can use either in Windows fine, but the moment I launch Maximus, the only keyboard actions I can perform are alt+tab and the windows key. I'm running Windows XP pro 64 bit sp2(no sp3 for pro 64). Not sure if that might be related. If I can get the task manager up and end the maximus process, everything is wonderful again(in windows). I also can not get the Input tab to read anything in the config screen either. I thought maybe if I remapped them I could get it to work. Nope. I can delete keys(with mouse) but can not re-add them. This is also from me launching it from the exe file, not Ctrl+P as others always suggest. This is simply because I can't. Maximus won't read my keys.
The config says left and right should swap out emulated systems, they are mapped as such. They respond that way in anything else in Windows. (I'm running default on the input config btw).
Not really sure what else to do. I'm only running the trial now and was falling in love with it while testing it on my Windows 7 PC. Threw it on my cab and it simply won't work. Not sure what to do. Found a few other similar threads on some forums but no one seems to believe the OP's and suggest things that don't really address the issue and no clear answer is really ever given.
I'll prob just go with another frontend I guess. Just hoping SOMEONE out there has an idea.
For more specs, using a J-Pac via USB and a keyboard via USB. I thought maybe maximus was confused at which keyboard to look at so I removed the actual keyboard and only used the j-pac. No go.
Cleansing my hands of this I guess and looking at another one.