With win2000 I used to be able to send a network message to someone over the internet by sending it to their IP address. For example, I would open command prompt and type: net send x.x.x.x then the message here. the x.x.x.x would be the ip address, but now with XP, i always get a message back that says the computer or network is busy. I can send the messages over my home network just fine, but not over the internet. Is that because the XP firewall is enabled or is it because of another reason?