Vista: Internet & DHCP problem

[quinriva]

I'm having difficulty connecting to the internet from within Vista. Firstly vista recognises my home network as an Unknown Network and sets it up as a public network. I have my ADSL router acting as the DHCP server and it seems fine with the other 3 computers on the network (Windows XP/Windows 2003 Server/Mac OS X); however Vista refuses to obtain it's IP from the router. If I force the Vista to use the following settings:

IP Adress: 192.168.1.37

Subnet Mask: 255.255.255.0

Default Gateway: 192.168.1.1

Then I can connect to other computers on the network, and I can see the router, but I still can't connect to the internet.

Does anyone know what could be preventing me from connecting to the internet? I am currently writing this through a Remote Desktop Connection to my Server (Windows 2003) from my Vista machine.