CATS Rejected workflow

Hi friends,

we are in ecc 6.

Can someone tell me the purpose of Rejected event in BO CATS? Whenever a timesheet approved or rejected, COMPLETED event triggers. Never Rejected event is triggering. I want to send an email to creator of timesheet in case his timesheet is getting rejected. Standard task 31000007 sends notification only to sap inbox. note that it is just a notification, no workitem is generated. so i cannot use RSWUWFML2.

Thanks

NAsh