Permission Problem Scheduled Batch File

I have a batch file which I would like to schedule to run using WIN AT. However, the purpose of this batch file is to run some backups (of an Oracle Database) with the output going to a Folder on another server (W2K). If I run the batch file from the server at a command prompt it works fine (because the server logon name has permisssion to write to the W2K folder in question). However, when scheduled using WIN AT (and it is important to schedule this job), then the batch file does not have the correct permissions to write to the folder. Has anyone got any ideas how I can get around this problem?

Regards
Mike Brooks