Use cutomBinding in WCF service hosted as windows service

Hi every one,
 
I can't translate the wsHttpBinding to an equivalent customBinding:
If I try to change the the binding properties in the endpoint tag from wsHttpBinding to RaffSannBinding I get error
 
I didn't change nothing in the service app.config file.
 
Have I to add an endpoint there?
There is something wrong in the windows form(that consume the service) app.config file?
The wcf service is hosted as windows service and not in IIS, it could be a problem use
custom binding?
 

here is the app.config file:
 

   <system.serviceModel>
        <bindings>
            <wsHttpBinding>
                <binding 
                  name="WSHttpBinding_IUtenti" 
                  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="Message">
                        <transport 
                            clientCredentialType="Windows" 
                            proxyCredentialType="None"
                            realm="" />
                        <message 
                            clientCredentialType="Windows" 
                            negotiateServiceCredential="true"
                            algorithmSuite="Default" 
                            establishSecurityContext="true" />
                    </security>
                </binding>
            </wsHttpBinding>
          
            <customBinding>
            <binding name="RaffSannBinding">
              <transactionFlow />
              <security 
                  authenticationMode="SecureConversation" 
                  messageSecurityVersion="WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10">
                <secureConversationBootstrap 
                  messageSecurityVersion="WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10">
                  <localClientSettings maxClockSkew="00:30:00" />
                  <localServiceSettings maxClockSkew="00:30:00" />
                </secureConversationBootstrap>
              </security>
              <textMessageEncoding />
                <httpTransport 
                  maxBufferSize="1073741824" 
                  maxReceivedMessageSize="1073741824" />
            </binding>
          </customBinding>
          
        </bindings>
        <client>
            <endpoint address="http://xxxmyserverxxx:8000/ServizioUtenti" binding="wsHttpBinding"
                bindingConfiguration="WSHttpBinding_IUtenti" contract="ServiceUtenti.IUtenti"
                name="WSHttpBinding_IUtenti">
                <identity>
                    <servicePrincipalName value="host/apsv01sc.raffsdb.pri" />
                </identity>
            </endpoint>
        </client>
    </system.serviceModel>