After thinking a bit, my original post seemed retarded.
Try this -- reseat the CMOS chip if necessary. Then power up with the CMOS clear jumper enabled. then power off and reset the CMOS clear jumper to the normal state. If all else fails -- remove the battery and wait a few hours or so. The CMOS charge should dissipate after about 20-30 minutes, but wait at least a full hour and see.