ON DELETE CASCADE doesn't work

CREATE TABLE table1

(

            id int4 PRIMARY KEY

DEFAULT nextval(‘bulletin_id_sq’)

);

CREATE TABLE table2(

            id int4,

name text,

            CONSTRAINT table3_id_fk FOREIGN KEY(id)

            REFERENCES table1(id)

ON DELETE CASCADE

ON UPDATE CASCADE

  );

CREATE TABLE table3

(

            id int4,

            content text,

            CONSTRAINT table3_id_fk FOREIGN KEY(id)

            REFERENCES table1(id)

ON DELETE CASCADE

ON UPDATE CASCADE

);

AND always when the table is created it informes that the trigger has created

for example I created a table test it gave this notice:

 create table test(id int4, constraint test_lang_id_fk foreign key(id) references languages(language_id) on delete cascade on update cascade);
NOTICE:  CREATE TABLE will create implicit trigger(s) for FOREIGN KEY check(s)
CREATE