SetVariable not working

[ShaolinWood]

Hi,

I can't get this SetVariabl() function to work in JavaScript.
The function stops reading with the command...

Here's my JS code:


function tellFlash() {
alert("Starting function");//still reads fine
var FlashObj = window.document["myFlashMovie"];
alert("Past Stage 1"); //Still works
FlashObj.SetVariable("pageID", "HALLO");
alert("FIN "+mainPage); //doesn't reach this point...
}
tellFlash();


Does ANYONE know how to make this work??

Thanks in Advance