WRT54G to EA6300 Router Issues (Server to internet)

Ok so I am having an issue with having my server to communicate with the WWW. When I hook up the old router I can get the web site working, when I hook up the new router I cannot get the web site working.

I have RDP working over the router
I have forwarded ll the neccessary Ports
I have compared the two routers and ensured that everything is as similar as can be.

Can anyone suggest something I am overlooking?