Triggers in pgadmin query tools

Hi all,
I have a table with a trigger. When I run an insert command from psql, 
the trigger is correctly fired, but if i run exactly the same command 
from the pgqdmin3 query tool, the trigger is not fired !
Is that normal ?
Any clue ?

F.
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PS : Here are the definitions :
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CREATE TABLE databases
(  id_databases serial NOT NULL,  hostname character varying,  hostid character varying,  dbname character varying,
commentscharacter varying,  CONSTRAINT databases_pkey PRIMARY KEY (id_databases),  CONSTRAINT db_is_unique UNIQUE
(hostname,hostid, dbname)
 
)
WITH (  OIDS=TRUE
);

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CREATE TRIGGER tai_databases0  AFTER INSERT OR UPDATE OR DELETE  ON databases  FOR EACH ROW  EXECUTE PROCEDURE
update_sequences();

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CREATE OR REPLACE FUNCTION update_sequences()  RETURNS trigger AS
$BODY$    DECLARE    id_db_ int8 ;    pos int8;    shift_ int8 ;    min_ int8;    max_ int8;    nextval_ int8;
newval_    int8;    seq varchar ='';    sequences_ varchar[] ;    BEGIN
 
    Select ARRAY['dbimage', 'exposure_file', 
'exposure','dead','bias','flat','photflat','night','detrendset','subtraction', 
'reference','release','access_mode','data_store','scheduler','object_type','log','code','action'] 
INTO sequences_;
    SELECT * FROM get_id_db() INTO id_db_  ;    shift_:=10^12;    min_:=shift_*id_db_;    max_:=shift_*(id_db_+1)-1;
    FOR pos IN 1 .. array_upper(sequences_, 1) LOOP        seq=sequences_[pos]||'_id_'||sequences_[pos]||'_seq';
SELECTnextval(seq) INTO nextval_ ;        IF ((nextval_ > max_) OR (nextval_ < min_)) THEN            SELECT
setval(seq,min_,'true')INTO newval_;        END IF;    END LOOP;
 
    RETURN NEW;
    END;
$BODY$  LANGUAGE 'plpgsql' VOLATILE SECURITY DEFINER  COST 100;

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CREATE OR REPLACE FUNCTION get_id_db()  RETURNS bigint AS
$BODY$    DECLARE    id_db_ int8 ;    BEGIN    id_db_:=0;
    SELECT id_databases INTO id_db_    FROM  databases    WHERE databases.hostname=hostname()    AND
databases.hostid=hostid()   AND databases.dbname=current_database()   ;
 
    IF  id_db_ IS NULL THEN    id_db_:=0;    END IF;
    RETURN id_db_;
    END;
$BODY$  LANGUAGE 'plpgsql' IMMUTABLE SECURITY DEFINER  COST 100;



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CREATE OR REPLACE FUNCTION hostid()  RETURNS character varying AS
$BODY$
#!/bin/sh
hostid
$BODY$  LANGUAGE 'plsh' IMMUTABLE SECURITY DEFINER  COST 100;


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CREATE OR REPLACE FUNCTION hostname()  RETURNS character varying AS
$BODY$
#!/bin/sh
hostname
$BODY$  LANGUAGE 'plsh' IMMUTABLE SECURITY DEFINER  COST 100;