Windows 7 with Aero Theme?? -

ok i need help... the aero theme wont work on my computer (running windows 7, build 7000) and my graphics card is ati mobility radeon 9000 and its enough to run chess titans with the 3-d view (smoothly) and when i click the theme with aero... it just go to the basic theme... plz help!!!

i had this problem what i did was i delted my custom theme selected a preset aero them and then restarted my computer and the theme i selected came up then you have to customize it i reported the bug to microsoft already hope they fix it soon