On Windows XP/2000 to run scheduled task, username and password is
required. This password must be the same as your Windows logon password. Please
confirm the execution account and the password on the properties of the
scheduled task. The password cannot be blank or the schedule will not run.
On Windows XP SP2, Schedules can be set to run using the current username and password. Select 'Run only if logged on' on the properties of the scheduled task.