WLAN with Verizon DSL

I have Verizon Online DSL and need to setup a wireless LAN. I have contacted Verizon, and they are no help. My desktop recognizes the Linksys WRT54GS wireless router. My laptop recognizes and connects to the wireless router. But, for some reason the router will not make the connection to the Verizon DSL. What can be the problem?

Thank you