Actiontec USB Wireless monitor failure

Got twin pack Actiontec USB wireless adaptors from Dabs. Work great and
excellent range. But can't get the wlanmonitor setup feature to run on my
win2k laptop. Had to configure them using windows network options (which was
OK - but can't monitor signal strength). Been on phone several times to
actiontec, had new drivers emailed but the monitor feature won't run - says
no wireless devices installed!!. Anyone else got similar prob or is my
laptop going screwy!
Chris