"No WS-Security header found"

Hi,
I am relatively new to Spring-WS and security.
I am getting the following response when trying to processing a message:

13 Dec 2011 12:09:33,515 DEBUG Wss4jSecurityInterceptor - Validating message [AxiomSoapMessage {http://www.website.ie/ras/webservices}doAuthenticateRetrieve] with actions [UsernameToken]
13 Dec 2011 12:09:33,515 WARN Wss4jSecurityInterceptor - Could not validate request: No WS-Security header found


The message is as follows:

<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:web="http://www.revenue.ie/ras/webservices">
<soapenv:Header>
<ns1:Security soapenv:actor="http://schemas.xmlsoap.org/soap/actor/next" soapenv:mustUnderstand="0" xmlns:ns1="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<ns1:UsernameToken>
<ns1:Username xsi:type="xsd:string">registration</ns1:Username>
<ns1:Password xsi:type="xsd:string">weblogic</ns1:Password>
</ns1:UsernameToken>
</ns1:Security>
</soapenv:Header>
<soapenv:Body>
<web:doAuthenticateRetrieve soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><string xsi:type="xsd:string" xs:type="type:string" xmlns:xs="http://www.w3.org/2000/XMLSchema-instance">?</string></web:doAuthenticateRetrieve>
</soapenv:Body>
</soapenv:Envelope>



As far as I can tell the WS-security header is present but perhaps you notice something I don't.

The following is how my spring servlet is configured
_______________________________________
<bean class="org.springframework.ws.server.endpoint.mapp ing.PayloadRootQNameEndpointMapping">
<property name="mappings">
<props>
<prop key="{http://www.website/webservices}doAuthenticateRetrieve">authenticateRe trieveEndpoint</prop>
</props>
</property>
<property name="interceptors">
<array>
<bean class="org.springframework.ws.server.endpoint.inte rceptor.PayloadLoggingInterceptor" />
<bean class="org.springframework.ws.soap.security.wss4j. Wss4jSecurityInterceptor">
<property name="validationActions" value="UsernameToken" />
<property name="validationCallbackHandler" ref="passwordCallbackHandler" />
</bean>
</array>
</property>
</bean>

<bean id="passwordCallbackHandler"
class="org.springframework.ws.soap.security.wss4j. callback.SimplePasswordValidationCallbackHandler">
<property name="users">
<props>
<prop key="AR{incoming.username}">AR{incoming.password}</prop>
</props>
</property>
</bean>
_______________________________________



Any clues?

Thanks,
Peter.