Actionscript 3 :: Flash MovieClip Code Not Running?

I've made a MovieClip of an electric wire with 3 different keyframes with a few frames between each. The first 2 keyframes have a single bitmap in each with a different picture, I want it to cycle between these two to make it look like the electricity is moving and not just sitting there. The 3rd keyframe has nothing, eventually I will put an image with the electricity off, so the player can walk through, I just haven't done it yet. Since I don't want it to run the last keyframe until the player turns it off, I put a gotoAndPlay(); command in the movie clip after the second frame looping it back to the first frame, problem is, the line refuses to work.

I have copied and pasted it from other programs where it worked, I have checked the Frame Name, I put other lines in there, like stop(); trace(); and other things, but could not get ANY line of code to work in the MovieClip. There's probably something like "the layer is invisible, code will not run", but I can't tell what it is. I've deleted the symbol and started over, same problem. I've restarted Flash, same problem. I've restarted the computer, same problem. I even took it to a different computer, same problem. I don't know why it won't run this code, is there something disabling it that I overlooked? I have other code in the main timeline outside the movie clip and code in other movieclips that has always worked fine and continues to work fine, I don't see what the problem is.

I ignored the problem for a while, and worked on other things, but I had to add multiple frames to an existing movieclip (which I believe was created before the other one), and now this movieclip is having the same problem. Does anyone know how to fix this, before it spreads to the rest?