[1.7.2] mouseClicked not worked

I have class, which extend GuiScreen, i'm trying override mouseClicked, but nothing happens

@Override
    protected void mouseClicked(int i, int j, int k)
    {
        System.out.println("Clicked!");
        if ((k != 0) || (this.hover < 0))
            return;
        if (this.multipleSelection)
        {
            if (this.selectedList.contains(this.list.get(this.hover)))
                this.selectedList.remove(this.list.get(this.hover));
            else
                this.selectedList.add(this.list.get(this.hover));
        }
        else {
            if (this.hover >= 0)
                this.selected = this.hover;
            this.hover = -1;
        }
    }