How to access root in Flash player 9 using AS1


I am working on a complex application that was originally developed with AS1 for Flash player6. I am trying to update this to Flash player 9 while keeping the script to AS1.

Now my main movie is published in Flash player 6 and the child movie is published for Flash player 9.

I am opening the main movie in Flash player 9 and it works but from my child movie I am trying to acces a method on the root timeline of the main movie.

Can someone tell me how can I acces the main movie root from within the child swf? or if this is possible or not?