Linksys Cable Modem Trouble Getting Linksys Wireless Router To Work With Linksys Cable Modem.?

Trouble getting Linksys wireless router to work with Linksys cable modem.? - linksys cable modem

I've been using cable Internet (DSL) have. I connect to the Internet via cable when the cable modem to a PC. Then plug the cable from the modem to the router, the router to my PC. I open the router configuration. I am the router for DHCP, I wrote the MAC address of the URL for the cable modem that you have registered with the cable companies. I turned off and the cable modem and router. I can not have an Internet connection in this configuration. Any idea what I missed?