Connection request failed

Hi all

I'm trying to create a multiplayer version of a racing game. I got most of it working, but this morning when I tested, the connection just suddenly kept failing.

I can start a server on one machine, but if I try to connect from another machine, I get the error 'The connection request to xxx.xxx.xxx.xxx failed. Are you sure the server can be connected to?' (where xxx is the ip address)

I have even tested with some demo apps, but I still get the same error. Is it a problem with unity or the server? Anybody can give me any hints?

Never mind, I got it fixed. I just changed the port number.