Actionscript in Duplicated movie not responding

Hello,

I have a small movie clip w/ a button that increments a variable and displays it in a text field w/in said movie. The code works perfectly when I run the movie clip by itself.

When I load the movie clip into another movie the actionscript suddenly doesn’t work.

I’ve set the button code w/ in the loaded clip like this:

mc_btn_cntr.onRelease = function()
{
cnt_var++;
this.txt_counter = cnt_var;
}

I just don’t get it.

Any Ideas?
thanks