Excute batch file from Oracle

I am using Tom Kytes code to run a windooze batch file from within oracle.

I can do it and have tested with a simple batch file that does time /t>> c:\temp\test.log. That works fine.

What I want to do is to schedule a job to run on another server
through windows AT. For this my batch file contents looks like 'at \\AAAAAAAA 10:34 C:\TEMP\STOP_APP_SERVER.BAT'. I can run this through the command line and also double click the batch file to schedule the job. When Oracle however executes the batch file it does not get scheduled - the procedure completes to success but no joy on the scheduling.

Any ideas?

Thanks