ActionScript 2.0 :: Activate Flash Fullscreen Mode When Flash Movie Loads In The Browser

I want to activate Flash Fullscreen mode when flash movie loads in the browser. Without activating it through button clicks. I tried for this using this type of code:

function goFullScreen()
{
Stage["displayState"] = "fullScreen";
}
goFullScreen();

But it is not working this way, it is working when I put this type of code:

function goFullScreen()
{
Stage["displayState"] = "fullScreen";

[Code]....