Loading external swf

hello,
i am loading an external .swf file in container. Each button opens a separate page. the problem is that the site becomes really really slow after the external swf opens or while it opens. Here is the code.

_root.background_mc.page.menu.b1.onRelease = function() {

if (_root.section != "home.swf") {
	_root.section = "home.swf";
	_root.background_mc.page.transition.gotoAndPlay("closing");
}

};
_root.background_mc.page.menu.b2.onRelease = function() {
if (_root.section != “services.swf”) {

	_root.section = "services.swf";
	_root.background_mc.page.transition.gotoAndPlay("closing");
}

};
_root.background_mc.page.menu.b3.onRelease = function() {
if (_root.section != “about_us.swf”) {

	_root.section = "about_us.swf";
	_root.background_mc.page.transition.gotoAndPlay("closing");
}

};
_root.background_mc.page.menu.b4.onRelease = function() {
if (_root.section != “projects.swf”) {

	_root.section = "projects.swf";
	_root.background_mc.page.transition.gotoAndPlay("closing");
}

};
_root.background_mc.page.menu.b5.onRelease = function() {
if (_root.section != “contact_us.swf”) {

	_root.section = "contact_us.swf";
	_root.background_mc.page.transition.gotoAndPlay("closing");
}

};

im not sure why is that happening. I dont mind importing the swf’s into the library and opening it from there. But i dont know how to do that. Can anyone please give me a solution for this. either locally or external.

cheers