It depends on how you are set up.
1. Are either of you operating behind a router?
2. Are either of you using a firewall?
If you can tell me the IP address you are trying to use aswell, that might help.
If you are directly connected to the internet, you should be able to retrieve your ip from typing ipconfig into command prompt. The host and client both then use that in the
set net connection command.
You are are behind a router(not directly connected to the internet) then both you and the person don't use the same IP address. The host must use the IP address obtained from ipconfig, and then the client uses the host's internet address(which the host can obtain by going to
http://www.whatsmyip.net). Of course, there is a bit more to it than this. You must also set up port forwarding on your router.
