question : postgres + Powerbuilder

Hi everybody, is there anybody developing apps with powerbuilder and
postgres as the db server ? my problem is that I have a function in postgres
to import data from a csv file that resides in the server, in pb a declare
that function as a store procedure and then I call it with the PowerBuilder
execute command, but nothing happens ( no data is imported), if I check for
an error after the execution of the statement in PB there is no error from
the server,so I dont know what could be wrong, but if I call de function
from de interactive sql in pagadmin3 the function does what it is intended
to do, i call the function this way in pgadmin interactive sql : select
my_echema.fn_function_import_dataxx()

any help is welcome

thanks in advance

Hugo