So you're saying that it breaks after you've been playing for a while? Not that it was working before and then something happened that now every time you play it you can never get it to switch screens? Just to be sure..

It'll be easier to answer this one if I can see your config. ISBoxer can copy it to the clipboard with your account names censored out, go to File, Copy to Clipboard (it'll pop up privacy options) and then you can paste it to pastebin.com and link it here