Black screen after loading

[BradleeKolvoord]

I have a problem when loading a rom. I just get a black screen. Nothing happens at all. Here is my code. Someone please help. `

	To play this game, please, download the latest Flash player!
	var resizeOwnEmulator = function(width, height)
	{
	var emulator = $('#emulator');
	emulator.css('width', width);
	emulator.css('height', height);
	}
	$(function()
	{
	function embed()
	{
	var emulator = $('#emulator');
	if(emulator)
	{
	var flashvars = {};
	var params = {};
	var attributes = {};
	params.allowscriptaccess = 'sameDomain';
	params.allowFullScreen = 'true';
	params.allowFullScreenInteractive = 'true';
	swfobject.embedSWF('flash/Nesbox.swf', 'emulator', '640', '480', '11.2.0', 'flash/expressInstall.swf', flashvars, params, attributes);
	}
	}
	embed();
	});

`