Win XP www connection problems through my network

Thanks in advance for your help!

I currently have a small home network. All the machines connect o an ADSL link through my Linux box. I only have 1 static IP so I use the IP masquerading features on the linux box to allow all the machines to connect to the internet at the same time.

This works fine for everything except the Windows XP machine.

The problem is most noticable when connecting to the internet.
It resolves domain names fine and will onect to a given site, bu then everything stops. You get about enough back for a google search reults page and thats it.

I can ping all the local machines, my internet gateway and my ISP, which I would expect because the DNS works fine.

Does anyone have any ideas what may be causing this??

Thanks

Nak.