screen/presentation issues

I use my 600M for school and do a fair amont of presentations but I can not get my presentation on the laptop screen and the projector screen.  Most other peoples laptops will do both.  It either puts it on the screen or on the laptop, but i can not get it on both.  I have the ATI 9000 64meg video card.  I have tried everything, the only things that happen are 1) it will put it up on the projector screen and not on the laptop 2) it will be on the laptop but not the projector screen 3) it wont be on either of them and 4) it will be normal on the laptop but I will only see the wallpaper but not the whole wallpaper and no icons, no powerpoint, etc.  I try changing the resoluation and color, etc when its like #4  but to no avail.  I have tried useing FN F8 and I have gone into the properties and still nothing.  Am I missing something????  Please help, no one so far has been able to.