Trigger workflow when a record is created in a database table .

I am try to completed following tutorial in sap technical .com

http://****************/Tutorials/Workflow/Table/events.htm.

but when i try to insert new entry in to table ZEMPDETAIL saving time it will pop up

following error Description. (attached Error.txt)

then I checked and all re activated allsubroutine, include and functional groups. this error popup

inside the  UPDATE_TAB subroutine following statement.

IF x_header-frm_on_new NE space.

   PERFORM (x_header-frm_on_new) IN PROGRAM.             "Zp 05

ENDIF.