Problem w/Motorola Modem and Linksys Router

Hello,
I reset the router to factory settings and have not been able to get online since. Connection is excellent, all the indicator lights are green, My ISP says I am connected, but the router and modem are not gettign together so that I can actually get online. I connect using a linksys router and the Motorola 2210. Any ideas on settings that need to be updated? I've done so much troubleshooting at this point I am not sure what else to try, but am open to any ideas.