Trigger calling a function HELP ME! (2)

Sorry. I realize I slipped an error in my code:

the code is:
---
CREATE TABLE public.imp_test
(
id int8,
value text
) WITHOUT OIDS;

CREATE OR REPLACE FUNCTION public.imp_test_to_out_test(imp_test)
RETURNS imp_test AS
'begin
return $1;
end;'
LANGUAGE 'plpgsql' STABLE;

CREATE OR REPLACE FUNCTION public.imp_test_trigger()
RETURNS trigger AS
'begin
return imp_test_to_out_test(new);
end;'
LANGUAGE 'plpgsql' STABLE;

CREATE TRIGGER imp_test_trigger_001
BEFORE INSERT OR UPDATE
ON public.imp_test
FOR EACH ROW
EXECUTE PROCEDURE public.imp_test_trigger();
---

regards,

=====
Riccardo G. Facchini