Rampart 1.1 Signing Timestamp

[Christian Mielke]

Hello, I use Rampart 1.1 and I want to sign a timestamp. I use folowing 
configuration inmy services.xml: 

<parameter name="OutflowSecurity"> 
   <action> 
      <items>Timestamp Signature Encrypt</items> 
      <signaturePropFile>server.properties</signaturePropFile> 
      <user>username</user> 
      <signatureparts> 
         {Element}{http://www.w3.org/2005/08/addressing}To; 
         {Element}{http://www.w3.org/2005/08/addressing}ReplyTo; 
         {Element}{http://www.w3.org/2005/08/addressing}MessageID; 
         {Element}{http://www.w3.org/2005/08/addressing}Action; 
         {Element}{http://www.w3.org/2005/08/addressing}RelatesTo; 
         
{Element}{http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd}Timestamp;
 
         {}{}Body; 
      </signatureparts> 
      <enableSignatureConfirmation>false</enableSignatureConfirmation> 
      <encryptionUser>clientusername</encryptionUser> 
      
<encryptionSymAlgorithm>http://www.w3.org/2001/04/xmlenc#aes256-cbc</encryptionSymAlgorithm>
 
      <encryptionKeyIdentifier>IssuerSerial</encryptionKeyIdentifier> 
      <passwordCallbackClass>handler</passwordCallbackClass> 
   </action> 
</parameter> 

I call the service with a .NET WCF client and I always get the error that the 
timestamp with ID xxx must be signed. Why? Timestamp is part of signatureparts? 
It would be very nice if someone could give me a hint. 

Greetings 
Chris