Change tasks runtime using schtasks

I am attemtping to use schtasks to change a taks run time using the command
line tool "schtasks"

As a test I am attempting to change the time of the scheduled defrag, using
the syntax:

SCHTASKS /Change /TN ScheduledDefrag /ST 15:00

This returns the following error:

ERROR: The specified task name "ScheduledDefrag" does not exist in the
system.

However if I run "schtasks /query " to quey all taks the folllowing is
retured

Folder: \Microsoft\Windows\Defrag
TaskName Next Run Time Status
========================================== ====================
===============
ManualDefrag N/A Ready
ScheduledDefrag 09/01/2008 01:00:00 Ready


Even in the Vista Scheduled taks GUI it shows the tasks name as
"ScheduledDefrag"


What is going on?

Sorry for the duplicate post!


"Super Play" <> wrote in message
news:%...
>I am attemtping to use schtasks to change a taks run time using the command
> line tool "schtasks"
>
> As a test I am attempting to change the time of the scheduled defrag,
> using
> the syntax:
>
> SCHTASKS /Change /TN ScheduledDefrag /ST 15:00
>
> This returns the following error:
>
> ERROR: The specified task name "ScheduledDefrag" does not exist in the
> system.
>
> However if I run "schtasks /query " to quey all taks the folllowing is
> retured
>
> Folder: \Microsoft\Windows\Defrag
> TaskName Next Run Time Status
> ========================================== ====================
> ===============
> ManualDefrag N/A Ready
> ScheduledDefrag 09/01/2008 01:00:00 Ready
>
>
> Even in the Vista Scheduled taks GUI it shows the tasks name as
> "ScheduledDefrag"
>
>
> What is going on?
>
>