Ws - Change Soap Header

Question

Hi, 

I'm trying to consume a WS (i think in Java), through https. i have the WSDL file and a soap sample of what i must send.

The problem is that in the soap header has tags from methods that does not exist in the wsdl, so i guess i need to change the soap header before i call the method.

<soapenv:Header>                                                                                                                                                                                                                           
      <credentials xmlns:teu-sec-crd="http://eu.site.com/security/credentials/1.0">
         <username>user1</username>
         <password>123</password>
      </credentials>                                                                                                                                                                                                                         
 </soapenv:Header> 
   <soapenv:Body>

This is how i need to send the sopa header.

thanks for any help.