wireless networking a laptop to a BTHub connected to a desktop

I am trying to connect my laptop to my BTHub-BA4D which my desktop is already
connected to now and working fine. I bought a wireless network card named
IEEE 802.11g Wireless Cardbus/PCI Adapter and it is not connecting me to the
internet. It is loaded and installed correctly, but I don't understand why it
is coming up with this message. It is saying that the Digital Signer of the
card is not digitally signed. It sometimes come up with error 10.
I have de-install and install on several occassion and the same error keeps
coming back. The Driver Provider is: Marvell. Driver Date is: 22/02/2005 and
Driver Version: 3.1.1.7

Hope to hear from you soon.

Regards

--
ko