Assuming this is the only site hosted on the server, I'd verify bindings are listening on * (asterik), which means all IP's. Or you can have a binding that has the Friendlyname in there. To locate the bindings, go to IIS Manager > Sitess > SiteName Right Click, select Edit Bindings. What is listed there?
Steve Schofield
Windows Server MVP - IIS
http://weblogs.asp.net/steveschofield
http://www.IISLogs.comLog archival solution
Install, Configure, Forget