Hello Jose
In PFTC-> Terminating event tab;Check if the bindings are maintained correctly for this task
In SWDD-> Activity step for this task->Outcome tab; check if the outcome for Terminating event is "active". If you have a terminating event against the task in PFTC , you will see a extra outcome in dailog step whcih needs to be activated.
Also check in SM12 if there is a workitem locking in production.
https://scn.sap.com/thread/654172
Regards
Sandy