Explicit/Implicit Namespace for output integration component in WebService

 Hello,I used siebel inbound webservice with an Integration object defined for output. I expect all tags have implicit namespace but for output integration object siebel doesn't defined named namespace.

In following example, soap message have :

• SOAP-ENV named namespace : OK
• ns named namespace : OK
• SwiOrganizationB2BOutIO is defined with no explicit namespace : KO 

How can we configure webeservice/IO in order to force explicit namespace :   <XXX:ListOfSwiOrganizationB2BOutIO xmlns:XXX="http://www.siebel.com/xml/SwiOrganizationB2BOutIO">

            <XXX:Account> ?

In Integration Object, userprop have been defined for Integration Object 'SwiOrganizationB2BOutIO' : XMLTagNamespace=http://www.siebel.com/xml/SwiOrganizationB2BOutIO and XSDTypeNamespace=