How can I add WS-A adressing to a SOAP webservice-request via Robot Framework? - soap

Question

I am new with Robot Framework and I run into a problem.
I try to call a web service that requires WSA (Web Service Addressing).
I tried sending a request while using SoapUI.
Sending a request via SoapUI provides a <wsa:Action>, a <wsa:RelatesTo> and a <wsa:MessageID> tag in the header when WSA is enabled.
Now I want to do the same with RobotFramework.
How can I inject these same tags via Robot Framework?
Here is my test
*** Settings ***
Library SudsLibrary
Library Collections
Library String
*** Test Cases ***
test
[Tags] blah
Create Soap Client C:${/}Robot WS${/}WS${/}wsdl${/}C60W30A.wsdl
Set Http Authentication MyUID MyPWD
${C60W30A}= Create Wsdl Object ns0:Invoer
${taimen}= Set Soap Headers "wsa:Action" GenBetKenmOperation
Set Wsdl Object Attribute ${C60W30A} Functie 04
Set Wsdl Object Attribute ${C60W30A} Bronsysteem COA
Set Wsdl Object Attribute ${C60W30A} Gebruiker WILLT10
${result}= Call Soap Method GenBetKenmOperation ${C60W30A}
Where the resulting XML is:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:ns0="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://www.MyCompany.nl/inning/coa/GenererenBetKenmerk" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<ns0:Body>
<ns1:GenererenBetKenm>
<Invoer>
<Functie>04</Functie>
<Bronsysteem>COA</Bronsysteem>
<Gebruiker>GeBrID</Gebruiker>
</Invoer>
</ns1:GenererenBetKenm>
</ns0:Body>
</SOAP-ENV:Envelope>
And the error:
FAIL : WebFault: Server raised fault: 'A required header representing a Message Addressing Property is not present'
As you can see the <wsa:Action> tag is missing. As wel are the other SOAP-header tags when I add them.