System.ServiceModel.ServiceActivationException in wcf service

I am trying to call my WCF service through a Flex application. I'm getting the System.ServiceModel.ServiceActivationException. I have Integrated Windows Auth switched to on, anonymous access off, and I've set impersonate to false in my web.config. The project and virt开发者_Python百科ual dir are named the same too.

What could be the issue?

<bindings>
  <webHttpBinding>
    <binding name="WebHttpEndpointBinding">
      <security mode="TransportCredentialOnly">
        <transport clientCredentialType="Windows"/>
      </security>
    </binding>
  </webHttpBinding>
</bindings>

This needed to be added to the config file.

The AspNetCompatibilityRequirements omission is another posible cause What you need to do is make sure your service has this.

[ServiceBehavior(UseSynchronizationContext = false,
ConcurrencyMode = ConcurrencyMode.Multiple,
InstanceContextMode = InstanceContextMode.PerCall),
AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service : IService

at IIS, Authentication, enable the Windows Authentication and ASP.NET Impersonation