SQL & PL/SQL :: Trigger Is Showing Bad Variable?

When i am compiling trigger with only "after update", trigger is running fast. But when i am running with "After insert or update or delete" event on trigger, trigger comes with compilation error.

SQL> drop trigger trg_stk_upd_pur;
Trigger dropped.
SQL> create or replace trigger trg_stk_upd_pur
2 after update on O_STOCK_EFFECTS
3 REFERENCING NEW AS new OLD AS old
4 FOR EACH ROW
5 begin
6 prc_stk_upd_pur(:old.seff_comp_suid, :old.seff_area_suid, :old.seff_tran_suid);
7 end;
8 /

[code].....

Warning: Trigger created with compilation errors.

SQL> sho err
Errors for TRIGGER TRG_STK_UPD_PUR:
LINE/COL ERROR
-------- -----------------------------------------------------------------
3/23 PLS-00049: bad bind variable 'OLD.SEFF_COMP_SUID'
3/44 PLS-00049: bad bind variable 'OLD.SEFF_AREA_SUID'
3/65 PLS-00049: bad bind variable 'OLD.SEFF_TRAN_SUID'

[code].....