Filewatcher is not working

 Hi Experts,

I am testing file watcher and i could not see any rows in the table

 Steps followed

1. create user test1 and grant dba to test1

2. conn test1/oracle

BEGIN

 DBMS_SCHEDULER.CREATE_CREDENTIAL('WATCH_CREDENTIAL', 'test1', 'oracle');

END;

/

3. 

begin

DBMS_SCHEDULER.CREATE_FILE_WATCHER (file_watcher_name=>'TEST_FILE_WATCHER',directory_path=>'/refresh/home/expdir',file_name=>'*.abc',credential_name=>'WATCH_CREDENTIAL',destination=>null,enabled=>false);

end;

/

4. create table fw_results_log(file_timestamp timestamp with time zone, directory_path varchar2(4000), file_size number);

5. create or replace procedure test_procedure

(fw_result in sys.scheduler_filewatcher_result) as