Classes and prototypes

Hi all

I’ve built a class which extends MovieClip an works ok.
In this class i’m creating some MCs

and this part works ok.

Before i’ve built some prototypes which adds some methods to the MovieClip object
I’d like to use these methods in the class i’ve created.

But using the include before the class statement throws an error during compile

How can i do to add the methods in the prototypes to my MCs in my class?