InvalidOperation Expection at startup

<configuration>
  <system.serviceModel>
   <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_ISynchronization"
                 maxBufferSize="2147483647"
                 maxReceivedMessageSize="2147483647">
          <security mode="None" />
        </binding>
      </basicHttpBinding>
      </bindings>
    <client>
      <endpoint address="http://localhost:9867/Services/Synchronization.svc"
                binding="basicHttpBinding"
                bindingConfiguration="BasicHttpBinding_ISynchronization"
                contract="SyncServiceReference.ISynchronization"
                name="BasicHttpBinding_ISynchronization" />
    </client>
  </system.serviceModel>
</configuration>

<configuration>
  <system.serviceModel>
   <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_ISynchronization"
                 maxBufferSize="2147483647"
                 maxReceivedMessageSize="2147483647">
          <security mode="None" />
        </binding>
      </basicHttpBinding>
      </bindings>
    <client>
      <endpoint name="EntityService"
                address="http://localhost:8000/EntityService.svc"
                binding="customBinding"
                contract="IdeaBlade.EntityModel.IEntityServiceContract"/>
 
      <endpoint name="EntityServer"
                address="http://localhost:8000/EntityServer.svc"
                binding="customBinding"
                contract="IdeaBlade.EntityModel.IEntityServerContract"/>
      
      <endpoint address="http://localhost:9867/Services/Synchronization.svc"
                binding="basicHttpBinding"
                bindingConfiguration="BasicHttpBinding_ISynchronization"
                contract="SyncServiceReference.ISynchronization"
                name="BasicHttpBinding_ISynchronization" />
    </client>
  </system.serviceModel>
</configuration>

along with following custom code

public class ProxyEvents : IdeaBlade.EntityModel.ServiceProxyEvents
    {
 
        public override void OnEndpointCreated(System.ServiceModel.Description.ServiceEndpoint endpoint)
        {
            base.OnEndpointCreated(endpoint);
 
            // Sample adding Gzip compression programmatically.  
            // Use when using a ServiceReferences.ClientConfig where a gzip binding cannot be added declaratively (this is a 
            // Silverlight limitation since it does not support extensions via config).
 
            if (endpoint.Binding is CustomBinding)
            {
                var binding = endpoint.Binding as CustomBinding;
                var elements = binding.CreateBindingElements();
 
                // Swap out binary/text message encoding for gzip/binary
                var encoding = elements.Find<MessageEncodingBindingElement>();
                if (encoding != null)
                {
                    elements.Remove(encoding);
                }
 
                encoding = new GZipMessageEncodingBindingElement();
                elements.Insert(0, encoding);
                elements.Add(new HttpTransportBindingElement { MaxReceivedMessageSize = 2147483647, MaxBufferSize = 2147483647 });
                endpoint.Binding = new CustomBinding(elements);
            }
            else if (endpoint.Binding == null)
            {
                var customBinding = new CustomBinding();
                var elements = customBinding.CreateBindingElements();
                var encoding = new GZipMessageEncodingBindingElement();
                elements.Insert(0, encoding);
                elements.Add(new HttpTransportBindingElement { MaxReceivedMessageSize = 2147483647, MaxBufferSize = 2147483647 });
 
                endpoint.Binding = new CustomBinding(elements);
            }
        }
    }