The errors are for me to help debug, your not supposed to know how to fix them That error looks like there is a cfg file that contains incorrectly formatted xml. I'm not sure if you have custom keys set up for games, but I would backup your cfg folder in Mame then delete it's contents. Try CPWizard again and see if that error returns. I have a feeling this is not the problem causing your input not to respond. You need to run a game in Mame (outside GameEx) then show the menu for CPWizard. Then if it's not allowing input, then close off CPWizard using Task Manager (Ctrl-Shift-Esc) to end CPWizard.exe task. Close off Mame, then post your CPWizard.log. The reason for this is I need to read the error log after your experiencing the input problem and without GameEx running will help me narrow things down a bit more.