Trigger does not behave as expected

Hi,

I have a trigger as below.

I am wondering why when I tried to insert to master table with date=
20080908,
the trigger does not insert to z_agg_tmcarr_pfx_gtwy_cc_w_20080908.

Is that something wrong with the statement "ELSEIF NEW.CallDate >=
20080908 AND NEW.CallDate <= 20080914  THEN"?


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CREATE OR REPLACE FUNCTION t_agg_tmcarr_pfx_gtwy_cc()
  RETURNS "trigger" AS
$BODY$
DECLARE
BEGIN
    IF (TG_OP = 'INSERT') THEN
        IF NEW.CallDate >= 20080901 AND NEW.CallDate <= 20080907 THEN
            INSERT INTO z_agg_tmcarr_pfx_gtwy_cc_w_20080901 VALUES ( NEW.* );
        ELSEIF NEW.CallDate >= 20080908 AND NEW.CallDate <= 20080914  THEN
            INSERT INTO z_agg_tmcarr_pfx_gtwy_cc_w_20080908 VALUES ( NEW.* );
        ELSEIF NEW.CallDate >= 20080915 AND NEW.CallDate <= 20080921  THEN
            INSERT INTO z_agg_tmcarr_pfx_gtwy_cc_w_20080915 VALUES ( NEW.* );
        END IF;
    END IF;
    RETURN NULL;
END;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;
ALTER FUNCTION t_agg_tmcarr_pfx_gtwy_cc() OWNER TO sa;