Every time I try to start Coherence mode I get an error that says "Unable to switch to Coherence Mode. Primary operating system does not support screen resolution requested by guest OS. Select another resolution for the guest OS or review your video system configuration." There is NOTHING in the user guide about this error. I don't even know what it means. My main OS X display is 1440x900. The XP screen is 1280x800. Coherence worked in the last version. I set XP to the same res as OS X but that didn't work either. And cmd+tab doesn't work in OS X while the XP login screen is up.