Netbackup Rman Scripts

Hi all,
Environment: Windows 2003, Oracle 9i (upgraded from Oracle 8)
I am configuring netbackup for oracle agent, and doing the rman scripts provided by netbackup samples.
The scripts has no problem of running locally by clicking the CMD file, and it connected to the Master server (Windows 2003) and does a backup.
However,when i trigger the scripts from Master server policy, the rman scripts output gives an error that user and password is invalid.

Any suggestion or direction? Is this an Windows authentication problem with Oracle while trigger the scripts remotely with Veritas Netbackup?

Thanks.

perhaps showing the error you got and the values it uses might help?