No ive done it properly on the 1,2 pins - its on it right now...Recheck where you left the cmos-clear jumper on the mainboard. You might not be putting it back on the default pins.
Otherwise I would replace the cmos battery.
Hi,Nah man I didnt buy a new battery, I took the current one out for 1/2 an hour, and put it back in.
Seemed to work - only when I reset my PC it began to behave oddly, not booting up correctly in a variety of ways.
I only can get it working if I clear the Cmos - though I get a checksum error when booting.