Permissions to access a Web Site

I've created a Web Site using Visual Interdev. I'm connected over Internet using a modem through an Internet Provider; I'm trying to make another machine on Internet to access my Web Site but it can't... over a LAN, everything is OK... but over Internet, it is not posible. I already discovered the Internet IP Address asigned to me by the Provider, but the other machine can't read my Site... if I type the same URL on a Internet Explore on my machine is OK. It seems to me to be some kind of permission....

Can anybody help me?

the url should look like this

http://your ip/the vir folder u want to access...if this doesn't work
check out with ur admin whether there is a firewall installed...
else check if u have given anonymous access to the folder if not give it...i hope it may work...

sonia