It is very late here so I may not have long -- what is the model number of your linksys router and do you have a manual for it?
I believe you probably have the router's administrative password and IP address I am guessing because you want to configure the router right?
IF so what happens when you type in
http://(ipaddress) to your browser does a password screen appear or not?
IF not have you tried entering
https://(ipaddress) into your browser and does a password screen appear?
IF not you may have the incorrect IP address for the router and please do the following:
Please click Start, then All Programs, then Accessories, then Command Prompt
In the window that opened enter
ipconfig
and press return
Reply to this message with the adapters, IP addresses, subnet masks and default gateways that are displayed. From that I can probably get the correct IP address.
This is a multi step process and this is only the first.