There was no endpoint listening at http://localhost:9384/Forumer.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
Chances are your WCF is using a different port number (or it is Auto-assigned), right click your WCF project, then look at the Web tab, then select the Specific port, put a number there, e.g. 9384