Internet access

[arcorreia]

I've been using wireless access to internet through rausb0.
Now I have the router in the room, next to my computer, and I tried to disable 
wifi access and have it through eth0.
I went to system configuration/network configuration and enabled eth0 and 
dissabled rausb0. Both are configureg for DHCP.
No matter what I do, I don't manage to have eth0 connecting to my service 
provider (Broadband cable).
And it's realy weird because before using wifi I was connected directly with 
eth0 without any problem.
Can someone help me through this?

Thanks,
Antonio