SWW_WI_START_SIMPLE and container elements with object references

[Sabine Blum]

Hi workflowers,
 
I've defined a method (in a SAP system with release 4.5B), which starts a workflow (WS task) in
another SAP system (release 4.6B) with the following ABAP code:
 
call function 'SWW_WI_START_SIMPLE' destination <DESTINATION>
     exporting
          task                         = 'WS99000068'
     importing
          wi_id                       = xwi_id
     tables
          agents                    = xagents
          wi_container         = xwf_container
     exceptions
          id_not_created                               = 1
          read_failed                                      = 2
          immediate_start_not_possible = 3
          execution_failed                            = 4
          invalid_status                                 = 5
          others                                                = 6.
 
Everything is fine, but i've got a problem with following:
 
Container elements with object reference (not scalar values) will NOT
arrive in the other system (in workflow container there). With scalar
elements it works fine!
 
Can anybody helps me in this question?
 
Thanks a lot
Sabine Blum