Cmos battery low. Cmos memory size wrong?

This is the message i get when i boot up my old computer. I have replaced the Cmos battery and cleared cmos and it still gets the same response.

"Cmos battery low, CMOS memory wrong size"

Its a Pcc Chips motherboard for a amd athlon xp 1500+. Any suggestions on how to fix this problem and what might be wrong?

thx

*edited it because i wrote the wrong motherboard.

^Bump^

I really need help! any suggestions at all?

Replace the battery? That migt make the whole message go away, if it's triggered by something like low voltage off the battery. It's a watch-type battery on your motherboard. Read off he model number from it and o buy a new one.