SQL & PL/SQL :: Invoking Oracle Bat File From Dbms_scheduler

I'm trying to call a simple batch file from dbms_scheduler, the job created successfully but I it doesn't invoke the batch file I've created.

This is the contents of my batch file :
EXEC hr.load_employees

And this is the job attempting to invoke it :

begin
dbms_scheduler.create_job
(job_name => 'EMP_HIST',
job_type => 'EXECUTABLE',
job_action => 'C:sql_scriptsemployees_load.sql > nul',
start_date => SYSDATE,
-- repeat_interval => 'FREQ=DAILY;BYHOUR=23', -- Every night at 23:00.
repeat_interval => 'FREQ=SECONDLY; INTERVAL=2', -- Every Minute
enabled => true,
comments => 'Copy the emp table to history');
end;
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