Animate buttons issue

[Henriquey]

I have 4 frames with next/prev frame buttons using action script. Everything works except on the 4th frame if I decide to go back to the 3rd frame, I cannot go forward again unless I go all the way back to the 1st frame. Once I arrive back to the 1st frame, I can do whetever I want again unless I arrive at the 4th frame again, then it's the same deal, need to go back to 1st frame to do what I want again.

What's going on?

[Nicktendo28]

make sure you are using this code.

/* Click to Go to Next Frame and Stop
Clicking on the specified symbol instance moves the playhead to the next frame and stops the movie.
*/

movieClip_1.addEventListener(MouseEvent.CLICK, fl_ClickToGoToNextFrame);

function fl_ClickToGoToNextFrame(event:MouseEvent):void
{
nextFrame();
}

/* Click to Go to Previous Frame and Stop
Clicking on the specified symbol instance moves the playhead to the previous frame and stops the movie.
*/

movieClip_1.addEventListener(MouseEvent.CLICK, fl_ClickToGoToPreviousFrame);

function fl_ClickToGoToPreviousFrame(event:MouseEvent):void
{
prevFrame();
}