Without any information to go on it is difficult to provide constructive suggestions. For example can you browse to the router? You might find giving the CSC a ring provides the quickest solution to this problem.
I'm wondering if you've set a static IP address in your PC's networking properties, and your new router is operating on a different subnet (i.e. 192.168.0.1 as opposed to 192.168.1.1) - could this be the case?