Overview form for a process

Hi,

I would like to create an overview form to display the business variables attached to the process.
All works fine, except when the process is complete, I can’t see anymore my variable.
I can’t see the link between process instance and business data…I see that my process is stored in a archived table and I can access with :
http://localhost:8080/bonita/API/bpm/archivedCase/18174
When I’m in the overview page when the process is completed, I can see in the URL :
http://localhost:8080/bonita/portal/homepage#?name=BOL_AvanceSolde_Final&version=1.0&id=18180&sourceObjectId=7154&token=DisplayCaseForm&_p=DisplayCaseForm&_pf=1

=> but in the page when I want to retrieve the id (declare a variable caseId of type URL with value = id) : if i display the variable, I have caseId = 7154 => this is not what I’ve asked ;-(

Can you help me to display information linked to a case when the process is completed ?