TypeError: Error #1006: value is not a function. Please help

programming flash
1

Hello,

I’ve tried to figure out why this didn’t work. Please maybe someone can help me out.
This is my code: I have 4 buttons that are named btn1, btn2, btn3, btn4.

if I do only trace(my_btn) it returns btn1, btn2, btn3, btn4. But when I try to tell them to stop on frame, it returns
TypeError: Error #1006: value is not a function.
at project_fla::MainTimeline/frame1()

This is my code

for (var i:int = 1 ; i <= 4 ; i++ ) {
var my_btn = “btn”+i;
trace(my_btn);
my_btn.gotoAndStop(i);
}

Thanks in advanced…