Disable FK constarints

Hi,

I try to load an entire database ( from Oracle via ora2pg )
create table is OK
there are some FK's in the database

I did insert's with :
BEGIN TRANSACTION;
SET CONSTRAINTS ALL DEFERRED;
insert ...
END TRANSACTION;

I get:
ERROR: insert or update on table "transactions" violates foreign key
constraint

How can I get rid off the FK CONSTRAINTS during the load ???

Thanks in advance...