You need to configure the service in the web.config like
<service name="AAA.AAA.AAA.WCFAccountService" behaviorConfiguration="AAA.AAA.AAA.WCFAccountServiceBehavior">
<endpoint name="IAccountService" address="" binding="wsHttpBinding" contract="AAA.AAA.AAA.IAccountService" />
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>