Connecting to PHP over LAN

Thanks for the replies,

If I'm running my apache server through WAMP, does the file need to be in C:\Program Files\Apache Group\Apache2\htdocs, or in C:\wamp\www? I have it in both just in case.

What's the easiest way to check if there's a firewall blocking connections on a particular port? I have tried changing the port in apache as well, but that does not seem to change things.

Thanks again!