WampServer

A little background. I can access my websites by going to [server] or what ever but not by using the domain name. I came here for help and was told to add in my router the HTTP from port 80 to port 80 and serve it on the server computer. I did this and it worked great. i then could use the domain to access the site. This is important sence I link a lot of news stories and every time I need to delete [server] and replace it with the domain name when I past a link. Not though I have a new machine serving the site. Did the exact same thing in the router the new server is hosting Wamp and HTTP but it wont work now. Any advice?