Putting flash into powerpoint

I am using a little Flash movie in the introduction slide of a powerpoint poduction. I inserted the Flash movie and set the settings for it in the properties box that comes up when you right click on the slide containing the Flash movie. The problem is that the first time I view the powerpoint file, all goes well. But then for some reason the settings alter themselves and change to say “playing=false” (meaning the flash will NOT autoplay on opening of slide like I want it to) and sometimes it will also alter “frameNum=1” to say “frameNum=2356” (meaning the movie is to always begin on frame 1, not some other frame).

I just don’t see a way to make the settings stick and not alter themselves.