Recieving error using FND_REQUEST.SUBMIT_REQUEST

I have a concurrent program which runs fine when submitted through standard report submission to the concurrent manager.  However, when I try to submit the report through the FND_REQUEST.SUBMIT_REQUEST API, it does not submit. 

Using "dbms_output.put_line('Request Not Submitted due to "' || fnd_message.get || '".');" I retrieve the error message from the stack

" Request Not Submitted due to "Encountered an error while getting the ORACLE user
account for your concurrent request."

I am doing exactly as the 11i application development guide specifies. I have tried both with and without fnd_profile.initialize, no difference.