One of the users of my program can't get it to connect to the Internet at all, it's as if he wasn't even connected, but I noticed one part of the program where a form is filled out and sent to an ASP page on my server that takes the data and emails it to me does work (I get the data he entered by email), but even though I get it he gets a "connection timed out" error.

He only has the SP2 firewall and tried to disable it and it still didnt work (it works on my PC with the SP@ firewall on and my program isn't in the "safe list", it only uses the http and https ports), he does have a hardware router which I was sure was the problem but when I told him to try and bypass it he said it still couldn't connect to the Internet.

Any idea what could cause this? Out of nearly 1000 users he is the only with this issue. I don't know where to look anymore.

Thanks