Have you checked your wireless settings?
Connect one of your computers directly for the moment, using both your modem and your Router as instructed.
Go to the link below and click the link to http://10.1.1.1
, even if you cannot connect to the internet. A small logon box will appear.
Follow the instructions under "Setting up WEP on your Belkin Wireless Router", this sets up a secured wireless and hopefully will have a step you may have missed while setting up. Be sure to record you Passphrase and Key 1 that is generated, you will need this to connect your wireless. Use the 64 bit option. Be sure to save your settings at the bottom of the page.
Leave one connected while you try to connect the other computer thru the wireless, you will need the Key 1 to enter, it should save this information so you dont have to enter it everytime. But be sure to save it in a safe place if you need it later. http://www.iinet.net.au/support/wireless/g...s_security.html
Also, if you check you exact model and version number you can get a firmware upgrade here, it will also give instructions on how to perform the upgrade.http://www.belkin.com/support/
At the top select "Networking" in the first box this will open choices in the second, select "Wireless", then your exact Model and version, should be found on the bottom of your router. Then select your modem. This should bring up the firmware in the large box below. Be sure you use the proper firmware upgrade for your model. They have helpful information in the same box.