Issue with monitor power off -- Dapper won't remember settings

[Wafa Hakim Orman]

Hi,

Been having a very weird problem with Dapper on my Dell Dimension 
desktop for a while now. Basically I have, or rather I want the "turn 
monitor off after 30 minutes" setting on. But every time I log out & log 
back in, & go into power management, I find that the setting has been 
unchecked. I have tried setting it as administrator, as user, all to no 
avail. If I log out & log back in, the setting is forgotten & the 
monitor won't turn off.

What do I do? Or what am I doing wrong?

Thanks in advance,
Wafa.
-- 
"One of the many major problems with governing people is that of
whom you get to do it; or rather of who manages to get people to
let them do it to them.
To summarize: it is a well-known fact that those people who must
want to rule people are, ipso facto, those least suited to do it.
To summarize the summary: anyone who is capable of getting themselves
made President should on no account be allowed to do the job."

     --Douglas Adams, "The Restaurant at the End of the Universe"