Service has zero application (non-infrastructure) endpoints

I would like to host my 'WCF REST' service without IIS. I have used the following url (http://msdn.microsoft.com/en-us/library/community/add/ms733069(v=vs.90).aspx[^]) and successfully implemented the sample given. 
 
But when I tried to implement my WCF Rest service, I got the following exception....

Service 'xxx' has zero application (non-infrastructure) endpoints. This might be because no
 configuration file was found for your application, or because no service element matching 
the service name could be found in the configuration file, or because no endpoints were 
defined in the service element.

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
<system.serviceModel> 
<services> 
<service name="Microsoft.ServiceModel.Samples.RestService" behaviorConfiguration="RestServiceBehavior"> 
<host> 
<baseAddresses> <add baseAddress="http://localhost:8000/ServiceModelSamples/service"/> </baseAddresses> 
</host> 
<endpoint address="" binding="wsHttpBinding" contract="Microsoft.ServiceModel.Samples.IRestService" /> 
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> 
</service> 
</services> 
<behaviors> 
<serviceBehaviors> <behavior name="RestServiceBehavior"> <serviceMetadata httpGetEnabled="true"/> 
<serviceDebug includeExceptionDetailInFaults="False"/> 
</behavior> </serviceBehaviors> </behaviors> </system.serviceModel> 
</configuration>