Do you have the User manual for this router? I dont see where it says to hookup your PC first to the Modem. I do not know what version you are using, so you will have to pick one. Here is the link:
http://www.linksys.com/servlet/Satel...ypage=download
Also be sure your network adapters are set to optain IP address automatically on your PC's
Let me know if this helps.
Bill