This is the second time I try to change this setting on a Vista based OS and I can't get it to work again.

OS: Windows Server 2002 SP2 (not R2) = Microsoft Windows [Version 6.0.6002] = Vista

When I go to: Power Options -> Change Plan Settings -> Change advanced power settings -> Power buttons and lid -> Start menu power button -> Setting: the available combo box will only show the option Shut down. No other options are available.

• This server is part of a domain and has not been set up by me.
• I have not yet talked with the domain admin, but as far as I could tell from googling, only Win7 has group policy options for the start menu. (And yes, OC I will talk to the domain admin to see if he has any clue - which I doubt.) ^{(Edit: I have now talked to our domain admin, and he's got no clue either.)}
• I'm responsible for this server and a local administrator but not a domain administrator.
• I switched off User Account Control (UAC) yesterday without problems.

Since I always log into this machine via RDP and this being a server, the natural choice would be the option (Log out) and not (Shut down).

What can I do to fix it or to find out why it cannot be changed? Thanks!