button1.enabled = true; problem

Hi there. Here is my problem: I have a few buttons on an MC. They are successfully disable by this code:

on (release) {
button1.enabled = false;
button2.enabled = false;
}

However, when I set the code to true on the “close” button of an externally loaded MC, it does not enable my buttons. Here are the codes I have tried to enable the buttons:

on (release) {
this.unloadMovie();
button1.enabled = true;
button2.enabled = true;
}

I also tried adding _parent.,_root.,_level0.,and level1. to the buttons.enabled = true; lines of code but it didn’t work either. Any idea what am I doing wrong? I looked at the other threads on this subject but they were of no help. Hope somebody can figure it out. Thanks.