Pass SAP user parameter id from SAP netweaver in a OpenDocument URL

Dear Guru's

I configure a SSO connection between our SAP ERP system and our BI platform (BO 4.1 SP6). The goal is to refresh a Webi report via an OpenDocument link in SAP Netweaver Business Client. As you can see below it's working except for a paramater.

The problem is refreshing the report and pass a SAP user parameter id (see below) to the OpenDocument via the URL:

http://BOSERVER.enterprise.local:8080/BOE/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=Ab2Ntd26O0lLmdztDjZzt0g&sRefreh=Yes&lsS0P_PLANT=WRK

We use a Webi report with a Bex query behind. We have to pass a value to 0P_PLANT.

The SAP user parameter is:

What must I do to pass the WRK value to the URL? Because I have the error below. This is in French but it means : "Not valid answer. Enter a value for the variable 0P_PLANT.

Could you please help me?

Greetings from Belgium.

François