kcorp lifestye wireless kit

i have a laptop and a 4 pc's and i want to set a wireless link to the laptop
having setup the access point hard wired first and all works fine. the
problem comes when i fit the wireless card to my laptop, my cpu goes into
overdrive running anyware from 5-90% and the system slows right down, remove
the card and everything goes back to normal.
laptop
xp pro
amd 3000+ 64bit
512 ddr
kcorp klg 520 pcma card

pc
xp pro
amd 2800
1 gig ddr

access point
kcoro kgl 575

any much appreciated