What error message are you getting? Did you create the appropriate Portal Alias so that you can reference it from other machines? If you setup your site and navigated to it via http://localhost/XXXXX, then you'll need to make sure you add a new portal alias (giving it a name or IP address) which you can use from other machines. You can do this by logging in as host and going to the Host/Portals tab. If you scroll to the bottom, you should see the area where you can add other portal aliases.
Sanjay

Can you confirm that IIS's site setting is set to give access to anoymous users.