How do I attach xml file reference to service request

I am accessing servcie endpoint at biztalk layer... I have one method to call...  In soap UI ,( form view ), i see
 

Extended Editor for ( root ) of type [null]

My request expects reference to xml ( Node) file... like this..



    <SubmitRequestResponseResponse xmlns="http://microsoft.practices.esb">
      <Root xmlns="http://schemas.microsoft.com/BizTalk/2003/Any">xml</Root>
    </SubmitRequestResponseResponse>


thanks in advance..

any answer please ?