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