questiononDHCP

I just switched DSL providers and am having problems accessing the internet because I need to change my TCP/IP address type to stop being "Assigned by DHCP". When I go to the Internet Protocol (TCP/IP) for my ethernet card, the general tab says obtain IP and DNS server manually. Alternate configuration tab says Automatic Private IP address. I tried uninstalling my ethernet card's drivers and reinstalling and it still defaults to DHCP. I even installed a totally new card with new drivers and the new card is now set to DHCP too. Help! I must have changed some settings when I set up the first dsl provider and I can't figure out how to undo. Thanks!