Mouse Listener wont work

Hi, Guys

My onMouseDown wont works when I upload the website. But work totally fine when I test it (Ctrl+Enter) or swf files. Some of them suggest it has got to do with the loadclip. Therefore, my onMouseDown wont works.

Sitemap

                loadClip onward & createEmptyMovieClips
  1. index.swf ----> 2. index1.swf Main Menu and Content ----> 3. Book flip engine ----> 4. Load Page by page swf

  2. Is where my onMouseDown were. I have no ideas or is there a workaround for it. Is there anything got to do with loadClip or EmptyMovieClip?

    //initializing mouse click handler
    mousecontroll = new Object();
    mousecontroll.onMouseDown = function()
    {
    }

    mousecontroll.onMouseUp = function()
    {
    }

    Mouse.addListener(mousecontroll);

    When I return to index1.swf, I will unload 3 and at the same time remove the mousecontroll object

    function removeML()
    {
    Mouse.removeListener(mousecontroll);
    }

Thank You
Benson