Wacom tablet/Screensaver problem

well, i just installed the driver for my Wacom Intuos2 on my PBG4.

everything's been great so far, until i disconnected the tablet and moved my mouse into my "hot corner" to activate my screensaver.

the screen fades black, like it's going to start the screensaver, but then flickers and goes back to my desktop.

i've tried fooling around with the screensaver settings, but that didn't do any good. and it's not just with my "hot corner" activation, it's with regular activation, too.

any suggestions on what i should do?