My Microsoft Sidewinder Force Feedback Pro joystick's force feedback capabilities seem to be working intermittently. Sometimes when I start a ff-enabled game, the forces work, and sometimes they don't. In fact, sometimes the joystick goes "limp", and I have to power the computer all the way down to re-initialize the joystick. I've tried reinstalling the joystick, adding and removing it from control panel, reinstalling the joystick's software, and reinstalling directx, all to no avail. However, except for when the joystick goes limp (in which case the computer indicates that it's not connected (in control panel)), the force feedback tester in control panel works fine. Any ideas?