Is there an IIS setting which overrides the MaxReceivedMessageSize in the web.config?

We are running IIS 7.5 on a Windows 2008R2 server. We have a web service which is returning a large number of rows.  Inside the webconfig, in the <system.servicemodel> <bindings> section we have a maxreceivedmessagesize established, but it does not appear to be working.  Is there a place within IIS itself that I need to increase a limit of some kind?  This is what we have in the web.config...

<bindings>
   <wsHttpBinding>
        <binding name="mutualCertificatesBinding" receiveTimeout="00:10:00" sendTimeout="00:10:00" maxReceivedMessageSize="200000000">
     <security mode="TransportWithMessageCredential">
      <transport clientCredentialType="None" />
      <message clientCredentialType="Certificate" negotiateServiceCredential="false" establishSecurityContext="false" />
     </security>
    </binding>
   </wsHttpBinding>
  </bindings>

This appears to be correct based on articles I have found, but our service is still getting an error for "maximum message size quota for incoming messgaes (65536) have been exceeded.

Any help would be greatly appreciated.