Peter,
It sounds like there is some glitch with the PC. Therefore, the best advice I can offer is to uninstal the driver, then reinstall the driver following the instructions for Windows 2000 and see if this solves the problem. Be sure to shut the computer down after reinstalling the driver, then reboot before turning on the keyboard. Hopefully, this will work.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)