Power Scheme tab not working anymore

Archived from groups: microsoft.public.windowsxp.configuration_manage (More info?)

I tried to edit the power schemes and show the icon in the system tray, but
after I clicked OK and tried to change the power scheme by double clicking
the icon, the power scheme tab no longer works. There seems to be no schemes
saved and I am unable to save any new ones.

Can anyone please help me with this problem as I need to change the power
schemes to be able to switch between using my PC for media centre tasks and
networking my daughters computer for internet access.

Thankyou in advance