Asus P4B533-E and clock/time

Hey, I have one of these motherboards and the one problem I'm having is that the clock doesn't seem to stay on the right time, it'll get off by anywhere from a couple minutes to 1/2 an hour within 12 hours. I even tried replacing the battery and that didn't do anything, can anyone recommend anything?

This was a long time ago but I had a AMD Tbird 950Mhz and some crap mobo. It would lose time at different intravels all the time I found out it was mcafee Anti virus software tweaking with my clock. I tryed reformating several times and putting in a new batt.
What finaly solved it was making the switch to Norton System Works.

My System: Parts on there way now!
Asus P4B533-E, Intel Pentium 4 2.4B 533Mhz, Crucial 256MB PC-2700

Parts recoved from old XP 1700+
Coolermaster ATC-201, Maxtor 60GB, Pionner DVD-116, HP 9100i, Sound Blaster Live!, ATI Radeon 7000VE