What is the best way to load a vector image in flash?

hey,
i have a vector file (.ai) of a “map” which i want to zoom and pan in flash. I also need to add some buttons on that map which will zoom and pan along with the map. I have converted the image to .swf file and imported on stage. But the problem is now after loading this screen, the flash becomes very slow. All the tween takes the jerks and nothing is smooth. Seems like importing the exported swf on stage takes lot of memory.

In this case, please suggest what is the best way to load the vector file in flash.

Thanks.