Flash movie autoplays although autoplay button is unchecked

I am using FCKEditor 2.6.1

Trying to embed a Flash file (.swf) - I unchecked "AutoPlay" in the "Advanced" tab, and the code looks like this:

<embed height="300" width="400" play="false" src="http://www.mydomain.com/userfiles/flash/Missoula-3min.swf" type="application/x-shockwave-flash" loop="false" menu="true" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>

But the flash file still autoplays. Is it possible that this is a problem with the flash file and not the code?

Thanks - ewitch