Synctoy scheduling question

When setting up a scheduled task, it assumes you want to use the currently
logged on users credentials. This is fine, until, as is sensible practise,
you change your password. this breaks the task. I've tried using the
NTAUTHORITY\SYSTEM account, and even created a dedicated "service" account,
but the tasks fail with the following error
Event Source: SyncToy
Event Category: None
Event ID: 2
Date: 02/01/2006
Time: 16:30:24
User: N/A
Computer: xxxxxxx
Description:
No folder pair named 'my folder' is defined. SyncToy is stopping.

Am I missing something, or will Synctoy only work with the current logged on
user?