Well if your firewall is up in your router then you'll have to forward port 8000 and 8001 to your local machine IP (type ipconfig -all in a dos window to see your local IP) on the network. On my linksys router you get to the config by typing 192.168.1.1 in a browser. Go into Advanced or whatever and port forwarding and forward ports 8000-8001 to your local IP and then try it again.
Here is the link of a port scanner so you can like, check from a webpage to see if your ports are open to the net or not.
Just go there, click proceed and then type in a port range in the white field (7995-8005 for example) and hit the USER SPECIFIED CUSTOM PORT PROBE button then scroll down to the port list and look. If it says STEALTH then the ports are hidden if it says CLOSED or OPEN then you are good to go.