Cannot connect to specific port

I've encountered the following issue: Let's say I have a WCF RIA service that's exposed via SOAP endpoint so other non-sl clients are able to consume its functionality. The things work out shiny when I try to connect locally e.g. http://localhost:[portnumber]/Services/[ServiceName].svc As soon as I replace the localhost wit开发者_运维技巧h the actual machine name I'm unable to consume the services even locally (actually only one of them is reachable whilst the others magically disappear). Trying to connect from another machine results in an error. Any hints?

Thanks in advance

---

Try add clientaccesspolicy.xml (if not added).
Network Security Access Restrictions in Silverlight is good article about security in silverlight. It can be helpful for you.