Problem with RealVNC

I've been using RealVNC server for the last few days, and it has worked great. (i've been using my computer through my ipod touch.) I have set it to launch at startup, but today, when i try to connect, my ipod says i got the wrong password, even though i didn't. So i checked all the VNC settings, and they were fine. When i hover my mouse over the icon in the system tray, it says "VNC server(User):not accepting connections." I can't find a function to make it accept connections, so i can't connect. Does anyone know how to make it start accepting connections again?

sounds like the firewall is blocking

By default, a VNC server will listen for connections from a VNC viewer on TCP port "5900+N", where N is the "Display Number" (usually just zero). So a VNC server setup for Display-0 will listen on TCP-5900, Display-1 is TCP-5901, etc.