Why cant my modem connect to the internet? It had no dial tone, I made some changes now it can dial but no web

I installed a Motorola SM56 speakerphone V.92 56k internal PCI modem. I tried to connect to my ISP (Earthlink) and got an Error Message: No dial tone detected, so I went into Properties>Connections>Call Preferences and changed the wait for dial tone setting. Now I can dial out but my modem just wont connect with my server. I used the Windows phone dialer program to call my cell phone just to make sure it works and it did but when I try to go online I can hear it dial and thats it,none of the strange noises a dial up connection usually makes when trying to make that handshake with the server computer can be heard.