Quicktime won't play in Mozilla Firefox

Hi,
I recently installed a newer version of Quicktime, 7 I think, and now Quicktime items won't play in my Firefox. They did before I installed the new version, and things load just fine in Internet Explorer, but I really would like it to also work in Firefox.
I've fiddled with different settings in the Quicktime and my Internet Options, but nothing seems to work. I am by no means good at that sort of thing, so I hope I didn't mess anything up further.
Any ideas how to get it to work again?
Thanks so much!

The settings on firefox were fine. It turns out that I had to change my code from object top embed. That worked and got the video to play in firefox. But ironically now the sound only sometimes works in firefox. If it is not one problem it is another. lol If you have any insight you can share it would be greatly appreciated.
Thanks man.

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