idoc syntax error not triggered

Hy Guru, i want to trigger an syntax error in a outbound standard idoc ( INVOICE)

1) create a custom task TS90000010

2) have been in the WE46 and change the standard task for the process code EDIR TS00007989 with my new custom task TS90000010

3) went to WE47 and select rows for the entries in field STATUS ( almost most with error in the definition

4) assign my task as identification

5) maintained accorglily Agent to whom the Error Notification needs to be mailed in WE20

but when i'm trying to send in idoc with an syntax error i do not recieve in the sap office the alert.

Am i missing something?

Thanx