C# - "remote Server Returned Error (403) Forbidden" With WCF Service In Https

I have a WCF Service that I have boiled down to next to nothing because of this error. It is driving me up the wall. Here's what I have now.

A very simple WCF service with one method that returns a string with the value, "test".
A very simple Web app that uses the service and puts the value of the string into a label.
A web server running IIS 6 on Win 2003 with a SSL certificate.

Other WCF services on the same server that work. I publish the WCF service to it's https location I run the web app in debug mode in VS and it works perfectly. I publish the web app to it's https location on the same server the WCF service resides under the same SSL certificate I get, "The remote server returned an error: (403) Forbidden" I have changed almost every setting in IIS as well as the WCF and Web apps to no avail. I have compared setting in the WCF services that work and everything is the same.

Below are the setting in the web.config for the WCF Service and the WEB app: It appears the problem has to do with the Web app but I am out of ideas.

WCF Service:
<system.serviceModel>
<bindings>
<client />
<services>
<service behaviorConfiguration="Ucf.Smtp.Wcf.SmtpServiceBehavior" name="Ucf.Smtp.Wcf.SmtpService">
<host>
<baseAddresses>
<add baseAddress="[|URL]" />
</baseAddresses>
</host>
<endpoint address="" binding="wsHttpBinding" contract="Ucf.Smtp.Wcf.ISmtpService" bindingConfiguration="SSLBinding">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="Ucf.Smtp.Wcf.SmtpServiceBehavior">
<serviceMetadata httpsGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" httpsHelpPageEnabled="True"/>
</behavior>
</serviceBehaviors>
</behaviors>

Web App:

<system.serviceModel>
<bindings><wsHttpBinding>
<binding name="WSHttpBinding_ISmtpService" closeTimeout="00:01:00"
openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text"
textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<reliableSession ordered="true" inactivityTimeout="00:10:00"
enabled="false" />
<security mode="Transport">
<transport clientCredentialType="None" proxyCredentialType="None"
realm="" />
<message clientCredentialType="Windows" negotiateServiceCredential="true"
establishSecurityContext="true" />
</security>
</binding>
<client>
<endpoint address="[URL]"
binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ISmtpService"
contract="SmtpService.ISmtpService" name="WSHttpBinding_ISmtpService">
<identity>
<dns value="localhost" />
</identity>
</client>
</system.serviceModel>