XP and Airport Base Station

Greetings,

I'm trying to get a stable connection to the internet with XP Home, it
works, but only for a day or so. . I did this successfully with 98SE and
never had any wireless problems.

I have a d-link cable modem hooked up to an Airport Base Station (Apple
Graphite). My Apple ibook is running the airport software and has an
airport card installed.

My PC has an Orinoco (Lucent) Silver PCMA card piggyback on a PCI Card.
WEP is not turned on. When I try to set it on the Apple ibook, XP
doesn't pick up a signal.

On XP in the Wireless Connections Properties window (the wireless network
tab) "Use windows to configure" is checked.

"Available Networking" Box shows nothing when it doesn't work and I have
to go to Network Connections/Network setup wizard/ and reset my
connection, then reboot.

"Preferred Networking" always shows the "Airport" (network name)

In the advanced button I have "Any available network" checked and
"Automatically connect to non preferred network" checked.

Any help appreciated.

Thanks,
Mark