Speedtouch 576 hangs at "Acquiring Network Address" Wireless

Hi,

I'd be really grateful for any advice here:

I have a Intel Centrino Fujitsu laptop with a built in wireless card.
The wireless card connects to other wireless networks but not my home
one.

I also know my home network works, as I am using my fujitsu laptop with
an ethernet cable. My second laptop connects via wireless to my home
network fine.

When I try to connect via wireless on my fujitsu laptop to my home
network, I get:

"Connecting..."
and it hangs at:
"Acquiring Network Address"....

I've tried disabling the firewall, restarting the wireless connection
and nothing works!

I'm using AOL (UK) broadband with a Speedtouch 576 router.

Oh - I can get the laptop to connect to AOL by disabling WEP security
on the router. But I don't want to have to use an unsecured network.

Can anyone help!
Thanks - alex

Ali Chambers