usb probs. after sp1

I bought new mobo and istalled winxp pro into it. After all drivers and sp1
i tried my usb printer and scanner. didnt work. After searching found in win
update patch but it did not help. I know its software issue because i
installed dual boot , same win xp pro into other partition, to use with
video editing and with this installation i did not ran sp1. All other
drivers i did and there usb is working!
Can anyone remember how to solve this issue?
My mobo is Chaintech njl4 with nforce2 ultra400 chip.
Thanks