Action on button doesn't work! HELP!

Hi Guys,

For school we have to make a assignment in flash… in this assignment i’ve made a button, thats not such a problem but the button must grows when i hit or release the button.

Now i’ve made the button and on go to the button timeline en on hit keyframe i made a Moviclip calls mc_btnhit there the button must grows up. Oke thats done but when i’m going to the main time line and add the following action on the button.

on(release) {
gotoAndPlay("mc_btnhit",1);
} 

the flash doesn’t give a error the code is actually right but when i’m testing the movie and i press on the button it won’t respont and doesn’t get bigger… so my question is what i’m doing wrong?

i hope sombody can help me…