HI! Problems with cursors into triggers

HELLO!

I'm making one trigger (plpgsql) and in the function i use CURSOR for to

bring an elements and to take them to a variable but no me it does not
work, WHY?????????????

The script is:

DROP TRIGGER miTrig on otro;
DROP FUNCTION miFunc();
DROP TABLE otro;
DROP TABLE cual;

CREATE TABLE otro (
    cuenta    integer;
);

CREATE TABLE  cual (
    cuenta1 integer;
    cuenta2 integer;
);

CREATE FUNCTION miFunc () RETURNS OPAQUE AS '
   DECLARE
      Cuenta_t INT4;
   BEGIN
      begin work;
      declare c_Cuenta CURSOR FOR SELECT * FROM otro;
      FETCH forward 1 in c_Cuenta INTO :Cuenta_t;
      CLOSE c_Cuenta;
      commit;
      INSERT INTO cual VALUES (Cuenta_t,NEW.cuenta);
      RETURN NEW;
   END; '

LANGUAGE 'plpgsql';

CREATE TRIGGER miTrig AFTER INSERT ON otro FOR EACH ROW EXECUTE
PROCEDURE miFunc();


Help me please!!!!!!!!!!!!!!!

Thanks

Mauricio Marín
Colombia