You have to configure the router to get the right access to internet.
Go into its first page (using internet explorer with the bar address usually 192.168.0.1 or 192.168.1.1).
Then input your login data for internet (user id, password) where it is requested.

With a router, it is always the router which is connected to internet (24/24) and share this connection with the pcs. You need a flat internet agreement.