Button inside symbol(movieclip) doesn't work. Plz help. thanks

I created a drop down menu which contains 3 buttons(home, contact, game). I had tried to put onRelease on its button itself, it couldnt work. Same as another method which the script on the layer actions. Can anyone please tell what is wrong with my flash? I’m still begginer in flash and i’m really clueless now. I had attached my file into this thread. Please have a look. Thousand thanks :slight_smile: