Movie clip and main timeline

i’m sure this is easy to answer but I cannot find a solution

I have a move clip with several buttons inside; their rollover seems fine. i am trying to get the buttons in the clip to address / go to the main movie timeline. Button names within the clip: c_btn, d_btn, etc. These are the symbols names; they have not been given unique instance names within the clip. The clip name is nav_all and its instance on the timeline is navall.mc

I am using Flash CS3, AS3.

Thank you in advance.