Parallel processing does not start in production system

Dear experts

I’m facing an issue regarding the “call function starting new task” sentence.

I tested this call on DEV, QUALITY and LAB systems successfully. I’m making a loop into the following sentence 3 times:

    lv_nombre = sy-index.
GETTIME.
CONCATENATE lv_nombre ' tarea' sy-uzeit INTO lv_nombre.
CALLFUNCTION'ZFCOPSEJ_003_MM_SOLP_R'STARTINGNEWTASK lv_nombre
DESTINATION INGROUPDEFAULT
EXPORTING
LOOP = lv_corte_tabla
l_h = l_h.

If I go to SM50, I see the 3 threads created perfectly on the 3 tested systems, however when I try to run the FM on production system I don’t see any thread and the program remains waiting for the response of the FM called.

This is a strange issue because my SAP Basis Team says the user which executes this FM on DEV, QEC and LAB has the same auths than in the production system, so I guess this issue could be caused by a system parameter. Any idea?

I’ve checked the thread http://scn.sap.com/thread/1909182 but my issue is not working yet.

Thanks in advance.

Kind regards,