Win 7 and firewall settings

Are you behind a router? If you've got a router you'll need to forward port 80 to your internal IP address. On top of that, some ISP's block the ability to run your own server. Although no ISP really allows you to run a web server, they don't actively check. But you should be aware that it is frowned upon and they are capable of terminating your connection because of it.

yes the router is set port 80, 21, 8000. I only hase the problem when i turn on windows firewall. I would like to keep it turn on just looking for the setting in the fire wall to allow the info to pass thru it

Also dyndns has a port cheking site and all good win the firewall is turn off port 80

Control Panel-> Windows Firewall

Click on Advanced Settings on the left hand side.

Click on Inbound Rules and you should be able to add Apache and or WAMP here. This will allow you to add the program/port to allow the inbound connection.

Give me a few minutes, I'm going to install WAMP and see what/where it installs.

When you first install, it asks whether you want to allow Apache HTTP Server (httpd) to have network access. To which you should have responded yes.

If you don't remember and or you did set it this way, it's possible the setting was corrupted.

Anyway, if you go into the window I explained above, you should have "Apache HTTP Server" listed under Inbound Rules with a green checkmark beside it. You'll most likely see 2 of them here. If you don't, you need to add them. One for TCP and one for UDP. When creating a new Rule, it will ask for a path to the program. It's
<drive you selected>:\wamp\bin\apache\apache2.2.11\bin\httpd.exe (This is of course assuming you downloaded the current version of WAMP)

The file is what needs access to the network on port 80 to be able to function as a web server. If you're unfamiliar with this information, I recommend looking at tutorials as well as reading up on how Apache works. Unfortunately, it's not as simple as "install, yay website!" :) Hope I was able to help.