I Can't raise the brightness to the maximum. I have a macbook pro late 2008. When Im raising the brighntess level, when it reaches the 50% it starts to decrease the brightness till it goes almost dark on 100%. Someone know how to do fix this?

thanks
take a look at your settings! so you dont have automatic brightness on, that COULD prevent it! "could.." second thing i would do is an SMC reset! if this doesn't work get back and we can to a little more trouble shooting!