Have you considered the alternative method of doing this? By editing the registry.
The location(s) to modify are as follows: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
(you will need to open the registry editor with administrative credentials to modify this location - affects all users) HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
(you can edit this from any account - affects the current user only)
Quote: Originally Posted by Dwarf
In the right-hand panel, right- click and choose New > String Value. Name it AutoLogOff (or whatever you want, this doesn't matter but it is helpful to have meaningful names). Next, right-click on the new entry and choose Modify... (alternatively, double-click it). Enter the following code (remember to include the spaces):
C:\Windows\system32\shutdown.exe /r /t 3630
Example taken from my posts in this thread: Solved Time usage control - Vista Forums
The parts to change are highlighted in RED.