SOAPClient fails to send message with <xs:any> data type

Issue

• We are using the soapUI version of SOAPClient (org.jboss.soa.esb.actions.soap.SOAPClient) to communicate with external Web services.
• The WSDL of a Web service with which we want to communicate includes the <xs:any> data type like following. When we send the parameter (@WebParam) as XML string, the SOAPClient does not send the data in the request.

<xs:complexType>
  <xs:sequence>
    <xs:any namespace="##other" processContents="lax"/>
  </xs:sequence>
</xs:complexType>

• When we use the soapUI client (GUI), it works fine with XML data as a parameter.