OnDone vents not supported for objects

I have a flash movie where I have put in the Done Playing action for when it has finished playing. When it has finished playing a button is shown. This is rather crucial. This works in exe but not in html. In fact when you publish to html it goes "On Done events not supported for objects". How do you get round this so it does work in html?Surely Trivantis would not bring out a very important feature like that and not have it work in the most important publishing medium i.e. html.Right?

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