This is usually a problem with the way GT Pro 2 is reading your driver profile. In order to reset this, please do the following: Go to My Computer Then C:\Program Files\Cakewalk\Guitar Tracks Pro 2. Find the files AUD.ini and GP2AudDx.ini (they may show up as "AUD" and "GP2AUDDX"). Select and delete these files. Reopen GT Pro 2. Your soundcard should be reprofiled, and the mix view should appear properly.