Usually laptops will have a extra application provided by the display
adaptor manufacturer to control display settings. Maybe you need to use
that.

Not sure why you can't control it via Vista though...

"Anon" <anon@anon> wrote in message
news:C106FDDB-2CCC-4B2A-AEB8-942FD2C3C896@microsoft.com...[color=blue]
> The brightness bar in windows mobility center doesnt increase or decrease
> the brightness of Lenovo 3000 N100 series laptop. What can be done?[/color]