Auto Power Down

Hi, On my dual PIII/500 machine the macine will not auto power off. I used to get this on my P4 but found it was because the multi-processor kernel had been installed and the solution was to uninstall that and install a single processor kernel. Obviously I want a multi-processor kernel on this box but I would also like it to power down automatically. James C. Rocks Equant Archway House Canary Wharf London E14 9SZ