Problem with sharing Internet connection?

[Mark D]

I have two computers, a laptop running Windows Vista and a computer running Windows XP.The laptop is connected to the Internet and I want the computer to access the Internet through the laptop.The network is connected by an RJ-45 cable and the Internet by another RJ-45 cable.

The internet connection works fine giving the laptop access to local files and the Internet.But the network connection is only giving the computer access to local files and not the internet.The connection status says that the network connection has limited connectivity.

I have tried many different things to fix this problem including repairing the connection but the computer still cannot access the Internet even though it can access local files on the other computer.

Could anyone give me any help with this?