WaveLAN weirdness

I just upgraded a machine from Win98 to XP Pro. It
contains an Orinoco Wireless WaveLAN PC card. Before
installing XP, the wireless connection has functioned
flawlessly with all other computers on the LAN for about 4
years under Win98.

Now, with XP, my connection terminates after approx 1
minute of use for no apparent reason. If I open the
network properties dialog and press OK again, the network
will work again for about a minute, then terminate, and so
on.

I can connect to that machine from another XP Pro machine
no problem. It is in another building with an ethernet
connection to a WaveLAN Wireless Access Point.

Does anyone know why this may be happening? All worked
fine with Win98. What could possibly be terminating my
connection from the newly upgraded machine???

Thanks for any help,
Greg