Help about tutorial :(

I am new here and new to flash, so if everything here sounds stupid excuse me.
I need some help about one of the tutorials on this page called “Preloader and Transition for Dynamic Files”. I did everything like it was in the tutorial and everything wotked great, but here is the thing - my buttons were too many so i wanted to make them in dropdaown menues but when i made the butons part of the dropdown menu they stoped working. I dont know why that happend so please help me figure that out.
I am attaching the file so you can take a look at it. On the attached file only one buton will work Tour2006
Thanks inadvance