Retrieve Instance Name of Dynamic Button

programming flash
1

Hi

I need to retieve the instance name of a button but cannot do it the same with a dynamic button the same as I can with a component button.
For a built in component button the below code would output _level0.buttonName, however for a dynamic button i have created it only outputs _level0.

on (release) {
trace(this);
}

Any ideas how to get the instance name of dynamic buttons?

Cheers