Server Administration :: Remote External Jobs On Windows?

I cannot run a Scheduler remote external job on Windows. Here's what I'm doing:

--Check that XDB isinstalled:
desc resource_view
--Check that MTS is running
sho parameters dispatcher
sho parameters shared_Server
--Setup an http listening port:
exec dbms_xdb.sethttpport(8080)

[code].....

This is the error:

orcl> select job_name, status, error#, actual_start_date, additional_info
2 from user_scheduler_job_run_details where job_name='TRYIT';
TRYIT
FAILED -1.074E+09
15-JUN-11 02.16.54.583000 EUROPE/LISBON

[code].....

I am certain that the communications and the credentials are correct, I've tried variants and get different errors. I think the problem is the job action. I've tried running batch files as well as OS commands, same result. THere is nothing useful in the core dump. Is there perhaps a Windows specific technique for running external jobs? Some way of nominating the batch file, or specifying a command interpreter?