Try assigning an internal IP address to the Local Area Connection that corresponds to your network adapter.
Control Panel -> Network Connections -> Right click on your Local Area Connection and select properties -> Click on TCP/IP and select properties.
Now insert 192.168.0.1 as the IP address and 255.255.255.0 as Subnet Mask. Leave default gateway blank.
Now go back to Control Panel and select Administrative Tools -> Services -> DCHP and select disable DCHP.
Also read About DSL for lots more information