Publishing Problems

I’m having some publishing problems with flash. I would do: <img src=“banner.swf”> to publish the flash file on the index page…but the file always shows the red box. So I went to type in the URL of the file: and it showed up [yes~!] but it showed up all blowned up its regular size. I know I’m suppose to change something in the publish menu, but I don’t know what…can someone help? =D