Oracle Database Discussions

How can I execute Unix Shell Script from Oracle using DBMS_SCHEDULER?

After reading through numerous examples online, I completed the 3 steps below -
Create Program, Create Job, Run Job. On my 3rd step, I get the following error.
How can I verify that the job was created?

ORA-27475: "APPS.POSPAY_FILE_CHECK_JOB" must be a job

1) Create Program

BEGIN
  dbms_scheduler.create_program(
	program_name => 'POSPAY_FILE_CHECK_PROG',
	program_type => 'EXECUTABLE',
	program_action => '/home/ldcgroup/ldccbc/POSPAY_USC2_CHECK.sh',
	number_of_arguments => 0,
	enabled => TRUE,
	comments => 'Test Program'
	);
END;

2) Create Job

BEGIN
DBMS_SCHEDULER.CREATE_JOB (
   job_name          =>  'POSPAY_CHECK_FILE_JOB',
   program_name      =>  'POSPAY_CHECK_FILE_PROG',
   enabled           =>   TRUE);
END;
/

3) Run the Job (no schedule, I will run this from an EBS Concurrent Request)

BEGIN
   DBMS_SCHEDULER.run_job (
	job_name => 'POSPAY_FILE_CHECK_JOB');
END;
/