Wireless Router, "Limited or No Connectivity"

Under the wireless networks, it tells me, "The problem occurred because the network did not assign a network address to the computer."

Background
Power outage and roomie didn't know better, and I wasn't there to stop him. Reset button on the back of my router was hit. I cannot connect to the net wirelessly in my home, despite having a direct connection to the router, and properly set up a 64-bit WEP key (I've had problems in the past with picking up signals if they encryption is set to 128-bit, and I've settled for "some is better than none").

"Topology"
Forgive me if I used the word wrong.

Cable modem -> Belkin Wireless G Plus MIMO router -> macbook (cabled to router), Vista desktop (cabled to router), XP SP3 machine (wireless)

XP machine has a Belkin Wireless G Desktop Card in it.

. . .

It was a real simple setup I had working before, but it's been so long since I had to set it up that I've forgotten what I did to get it working in the first place. Suggestions, tips?

Edited by Pandy, 31 July 2010 - 12:19 AM.
Moved from External Harware to Networking at the request of the OP ~Pandy

I'm thinking that I should turn the DHCP server off and assign IP addresses... but that means meddling with each individual computer, and I was hoping for a one-point fix, since I never had to manually configure them before...

If you are running Vista, even M$ probably can not help you.

The vista computer is connected to the router by a cable. It has no problems.

It's the XP computer that won't connect wirelessly.

Under network connections right click the name of your wireless network connection go to properties>internet protocol version 4(TCIPv4) make sure obtain an ip address is assigned automatically and DNS server address is set to automatic., this should be the same on the router.

I ended up manually assigning an IP address to the computer, within the router's address block.

But my connection properties, on both the router and computer were DHCP. One was supposed to pick up the IP automatically, and one was supposed to give the IP automatically.

What a headache. But it is working now.

Thanks!

No worries