Netgear DG824M and internal Toshiba WiFI card

Hi

I've recently set up a wireless network which works perfectly when I
use the Netgear PC card to access the WAP. However, whatever I do I
cannot get the internal WLAN card on my Toshiba Sat Pro 6100 to see
the network (it's not even shown in the available networks panel,
despite setting all the WEP and channel details through the various
configuration screens). What could I have missed?

Thanks for any help you can give.