WS-Security: Insert thumbprint reference

Hello everyone !
I'm trying to create a test message with SoapUI 3.5.1 for a webservice I'm creating. The WS should be compliant with this WS-Policy:

<wsp:Policy wsu:Id="CatalogoDadosPort_Fault_Policy">
 <sp:SignedParts />
 <sp:SignedElements />
 <sp:EncryptedParts />
 <sp:EncryptedElements />
</wsp:Policy>
<wsp:Policy wsu:Id="CatalogoDadosPort_Input_Policy">

 <sp:SignedParts>
  <sp:Body />
  <sp:Header Name="fmw-context" Namespace="http://xmlns.oracle.com/fmw/context/1.0" />
  <sp:Header Name="" Namespace="http://www.w3.org/2005/08/addressing" />
  <sp:Header Name=""
   Namespace="http://schemas.xmlsoap.org/ws/2004/08/addressing" />
 </sp:SignedParts>
 <sp:SignedElements />

 <sp:EncryptedParts>
  <sp:Body />
  <sp:Header Name="fmw-context" Namespace="http://xmlns.oracle.com/fmw/context/1.0" />
 </sp:EncryptedParts>
 <sp:EncryptedElements />
</wsp:Policy>

<wsp:Policy wsu:Id="CatalogoDadosPort_Output_Policy">
 <sp:SignedParts>
  <sp:Body />
 </sp:SignedParts>
 <sp:SignedElements />
 <sp:EncryptedParts>
  <sp:Body />
 </sp:EncryptedParts>
 <sp:EncryptedElements />
</wsp:Policy>

<wsp:Policy wsu:Id="wss11_x509_token_with_message_protection_service_policy">

 <sp:SymmetricBinding>
  <wsp:Policy>
   <sp:ProtectionToken>
    <wsp:Policy>
     <sp:X509Token
      sp:IncludeToken="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy/IncludeToken/Never">
      <wsp:Policy>
       <sp:RequireThumbprintReference />
       <sp:WssX509V3Token11 />
      </wsp:Policy>
     </sp:X509Token>
    </wsp:Policy>
   </sp:ProtectionToken>

   <sp:AlgorithmSuite>
    <wsp:Policy>
     <sp:Basic128 />
    </wsp:Policy>
   </sp:AlgorithmSuite>
   <sp:Layout>
    <wsp:Policy>
     <sp:Lax />
    </wsp:Policy>
   </sp:Layout>
   <sp:IncludeTimestamp />
   <sp:ProtectTokens />
   <sp:OnlySignEntireHeadersAndBody />
  </wsp:Policy>
 </sp:SymmetricBinding>

 <sp:EndorsingSupportingTokens>
  <wsp:Policy>
   <sp:X509Token
    sp:IncludeToken="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy/IncludeToken/AlwaysToRecipient">
    <wsp:Policy>
     <sp:WssX509V3Token11 />
    </wsp:Policy>
   </sp:X509Token>
  </wsp:Policy>
 </sp:EndorsingSupportingTokens>
 <sp:Wss11>
  <wsp:Policy>
   <sp:RequireSignatureConfirmation />
   <sp:MustSupportRefEncryptedKey />
  </wsp:Policy>
 </sp:Wss11>
</wsp:Policy>

Well, the problem is, the policy requires a thumbprint reference as Encryption Mechanism. However, I have no Idea how to change that in SOAP UI, so I'm getting the following error message in the server:
"Error in Encryption reference mechanism compliance : Expected : thumbprint , Actual : direct."
So, how can I make SOAPUi use the thumbprint mechanism ?? Any help will be appretiated !
Thanks!