Trigger Created With Compilation Errors

I've build a simple trigger like this:

CREATE or REPLACE TRIGGER my_trigger
BEFORE UPDATE OF PASSWORD ON mytable
FOR EACH ROW
DECLARE
BEGIN
:NEW.PASSORD := 'xyzt';
EXCEPTION
WHEN OTHERS THEN
raise_application_error(-20001,'Error '|| sqlerrm);
END trigger_create_user;

But, when i execute it, i get the following message:Warning: Trigger created with compilation errors.Even if i do nothing in trigger body:

CREATE or REPLACE TRIGGER my_trigger
BEFORE UPDATE OF PASSWORD ON mytable
FOR EACH ROW
DECLARE
BEGIN
END trigger_create_user;

I still get that message.