Multiple subquery with insert into command ?

Hello guys !
I have problem with my query, i want to use the multiple insert possibility
of pgsql...

INSERT INTO umzintersect (intersection,umz00_id,pop, comm_id, name_asci)
(SELECT intersection(umz_project.the_geom, lau2.the_geom),
umz_project.umz00_id, umz_project.pop, lau2.comm_id, lau2.name_asci
FROM umz_project, lau2,big_umz
WHERE umz_project.umz00_id = big_umz.umz00_id AND umz_project.the_geom &&
lau2.the_geom AND umz_project.umz00_id = 23),
(SELECT intersection(umz_project.the_geom, lau2.the_geom),
umz_project.umz00_id, umz_project.pop, lau2.comm_id, lau2.name_asci
FROM umz_project, lau2,big_umz
WHERE umz_project.umz00_id = big_umz.umz00_id AND umz_project.the_geom &&
lau2.the_geom AND umz_project.umz00_id = 58);

I have this error code :
********** Erreur **********

ERREUR: erreur de syntaxe sur ou près de « , »
État SQL :42601
Caractère : 353

I don't understand where is my error ...
With only one select, the query run, but with two, i have this error..

Perhaps insert into with multiple subquery is impossible ? So, how can i do
this query without loose the GREAT multi query possibility of postgresql ?

Thanks a lot in advance :)
Seb