geezers!

Has #include been mangled for the Flash 9 preview?

I cant use it at all. Every time I build it says there is a syntax error and this :
ReferenceError: Error #1065: Variable Timeline0_f054bee8b6882e459af1757d996988f7 is not defined.

Why can't I use includes!? I can use them no problem in Flex. I need them!!!!