Problem with Datapump in 11g

Question

os windows server 2008
db 11.1.0.7.0
i have created an user with following rigths
GRANT EXP_FULL_DATABASE
GRANT CREATE JOB
GRANT CREATE PROCEDURE
GRANT CREATE VIEW
GRANT CREATE TABLE
GRANT CREATE SESSION
GRANT READ ON DIRECTORY data_pump_dir
GRANT WRITE ON DIRECTORY data_pump_dir
when i run
declare
dp_handle1 number;
begin
dp_handle1 := DBMS_DATAPUMP.open(
operation=>'EXPORT',
job_mode=>'FULL',
remote_link=>NULL,
job_name=> 'my_test_job',
version=>'COMPATIBLE');
end;
i get
ORA-31626: Job ist nicht vorhanden
ORA-06512: in "SYS.DBMS_SYS_ERROR", Zeile 79
ORA-06512: in "SYS.DBMS_DATAPUMP", Zeile 902
ORA-06512: in "SYS.DBMS_DATAPUMP", Zeile 4758
when i run the same snippet as sys
everything is ok
any ideas why it won't work for my user?

Answer 1

From the documentation:
If the OPEN fails, call GET_STATUS with a null handle to retrieve additional information about the failure.Have you tried this?