i seem to have a simple logic error. i'm trying to attach a 2d audio clip to a slider to control the volume but i'm having no luck. the slider is being created after a press of the button here is my code :

var buttonPressed = false;

var volume : float = 0.0;

var musicslider : float = 0.0;

audio.volume = musicslider;



function OnGUI () {
    if (GUI.Button (Rect (300, 200, 80, 40), "volumeControl"))
    {
        buttonPressed = true;
    }

    if(buttonPressed == true)
    {
    musicslider = GUI.HorizontalSlider (Rect (300, 200, 100, 40), musicslider, 1.0, 10.0);
    } 

        else{

        }