Hi,
When I invoke web service through my spring client with security interceptor in apache-tomcat 6.0.26 causing below error. Please suggest what could be the root cause of this.

Caused by: java.lang.IllegalArgumentException: Object of class
[$Proxy19] must be an instance of class
org.springframework.ws.soap.saaj.SaajSoapMessageFa ctory
at org.springframework.util.Assert.isInstanceOf(Asser t.java:337)
at org.springframework.util.Assert.isInstanceOf(Asser t.java:319)
at
org.springframework.ws.soap.security.wss4j.Wss4jSe curityInterceptor.toDocument(Wss4jSecurityIntercep tor.java:603)
at
org.springframework.ws.soap.security.wss4j.Wss4jSe curityInterceptor.secureMessage(Wss4jSecurityInter ceptor.java:447)
at
org.springframework.ws.soap.security.AbstractWsSec urityInterceptor.handleRequest(AbstractWsSecurityI nterceptor.java:182)
at
org.springframework.ws.client.core.WebServiceTempl ate.doSendAndReceive(WebServiceTemplate.java:541)

I am using spring-ws-security 1.5.5

Following is my spring client configuration
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<bean id="messagFactory" class="org.springframework.ws.soap.saaj.SaajSoapMe ssageFactory"/>

<bean id="abstractClient" abstract="true">
<constructor-arg ref="auditService_client_messagFactory"/>
<property name="destinationProvider">
<bean class="org.springframework.ws.client.support.desti nation.Wsdl11DestinationProvider">
<property name="wsdl" value="${audit.serverUrl}${audit.serviceName}"/>
</bean>
</property>
</bean>

<bean id="marshaller"
class="org.springframework.oxm.jaxb.Jaxb2Marshalle r">
<property name="contextPath">
<value>com.atomic.core.auditservice.client.dto</value>
</property>
</bean>

<bean id="springClient" parent="auditService_client_abstractClient" class="client.impl.SpringClient">
<property name="marshaller" ref="marshaller"/>
<property name="unmarshaller" ref="marshaller"/>
<property name="interceptors">
<list>
<ref bean="securityInterceptor"/>
</list>
</property>
</bean>

<!-- Security interceptor configuration -->
<bean id="securityInterceptor" class="org.springframework.ws.soap.security.wss4j. Wss4jSecurityInterceptor">
<property name="securementActions" value="UsernameToken"/>
<property name="securementUsername"><value>user</value></property>
<property name="securementPassword"><value>pwd</value></property>
<property name="securementPasswordType" value="PasswordText"/>
</bean>

</beans>