1. When a concurrent program has parameters, you must pass a value (or null) for each parameter that is on the Concurrent Program Definition - it is NOT the parameters that you see in the Request Set Definition as ones that are not displayed cannot be seen there, but programmatically are required.
2. Default values that are set up in the concurrent program definition, or the request set definition are not calculated for you - you must pass them in programmatically
3. ALL stages of the request set must be programmatically dealt with - failure to do so will prevent the request set from running and you will not see ANY of it (the request set is effectively rolled back).
4. The values of the parameters that you pass must correspond to the values seen in the Parameters field in the Requests Windows, when you manually launch the job.

(application => 'XX'
,request_set => 'XX_SAMPLE'
);

-- ----------------------------------------------------
-- SQL*Load the Ship To Addresses
-- ----------------------------------------------------

l_action := '1st job - 1st stage 1st request';
DBMS_OUTPUT.PUT_LINE(l_action);
l_ok := fnd_submit.submit_program

(application => 'XX'
,program => 'XX_CONC_PROG1'
,stage => 'RS_STAGE_10'
,argument1 => 'conc prog params here'
);

l_success := -100;

-- ----------------------------------------------------
-- SQL*Load the Invoices
-- ----------------------------------------------------

l_action := '2nd job - 1st stage 2nd request';
DBMS_OUTPUT.PUT_LINE(l_action);
l_ok := fnd_submit.submit_program

(application => 'XX'
,program => 'XX_CONC_PROG2'
,stage => 'RS_STAGE_10'
,argument1 => 'conc prog params here'
);

l_success := -110;

l_action := '3rd job - 2nd stage 1st request';
DBMS_OUTPUT.PUT_LINE(l_action);
l_ok := fnd_submit.submit_program

(application => 'XX'
,program => 'XX_CONC_PROG3'
,stage => 'RS_STAGE_20'
,argument1 => 'conc prog params here'
);

l_success := -120;

l_action := '4th job - 3rd stage 1st request';
DBMS_OUTPUT.PUT_LINE(l_action);
l_ok := fnd_submit.submit_program

(application => 'AR'
,program => 'RAXMTR'
,stage => 'INV_INTERIM_60'
,argument1 => '1'
,argument2 => TO_CHAR(l_batch_source_id)
,argument3 => 'MP KRYTON'
,argument4 => TO_CHAR(TRUNC((SYSDATE - 0.5)),'RRRR/MM/DD HH24:MI:SS')
,argument5 => NULL
,argument6 => NULL
,argument7 => NULL
,argument8 => NULL
,argument9 => NULL
,argument10 => NULL
,argument11 => NULL
,argument12 => NULL
,argument13 => NULL
,argument14 => NULL
,argument15 => NULL
,argument16 => NULL
,argument17 => NULL
,argument18 => NULL
,argument19 => NULL
,argument20 => NULL
,argument21 => NULL
,argument22 => NULL
,argument23 => NULL
,argument24 => NULL
,argument25 => 'Y'
,argument26 => NULL
,argument27 => fnd_profile.VALUE('ORG_ID')
);

l_success := -145;

-- ----------------------------------------------------
-- Run the job and then wait until all requests
-- have completed processing - we have to wait because
-- when we exit here the file is moved to a different
-- directory.
-- ----------------------------------------------------

l_request_id := fnd_submit.submit_set(NULL,FALSE);
DBMS_OUTPUT.PUT_LINE('Request_id = '||l_request_id);
COMMIT;
l_complete := fnd_concurrent.wait_for_request

(request_id => l_request_id
,INTERVAL => 2
,max_wait => 120
,phase => l_phase
,status => l_status
,dev_phase => l_dev_phase
,dev_status => l_dev_status
,message => l_message
);

l_success := -150;

p_success := l_request_id;

DBMS_OUTPUT.PUT_LINE('Error: '||l_success||' - Problem with '||l_action);
p_success := l_success;