SAP Message BT140 - You can only change your own jobs.

Diagnosis
You must have background administrator authorization in order to changea background job that was scheduled by another user.

System Response
Your changes to the job have not been made.

Procedure
Have your user administrator give you the background administratorauthorization. See the documentation for the Background ProcessingAdministratorBatch-Verarbeitung: Batch-Administratorauthorization object.