Combo Box not working within Movie Clip

hi all hope you can help

i am having trouble getting a Combo Box to work within a movie clip. Also i havbe a laoder on the main screen that loads a swf which conatins this Movie Clip with the combo box in.

I have searched the forums to see what i could find but i only found tis link, but i still cant solve my proble.

my file is loacted here if you would like to take a look