When you connect from outside, make sure you are using your modems ip address. If you connect internally using 192.168.254.254 or somesuch, thats great; but its an address that will only work on your network. What you will need to do is dial into your modems ip, which will look at your router and get routed to the right computer.

check that whatismyip.com just to be quick and easy.

Bipper