Laptops :: How to make my lappy sleep?

Hi,

I installed DSL 2.4 on my Sony Vaio SR33 (128Mb ram) laptop. This laptop used to have WinME on it earlier and I could make it to go to sleep by pressing Fn-Esc in Windows ME. But now I cannot make it go to sleep by pressing the same keys. Also, this model of laptop doesnt have the feature where you close the lid and it goes to sleep. Does anyone here know how to make my laptop go to sleep now that I am using DSL?

original here.