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