Flash Player 9 Problems?

First off, I use IE as my browser (that might be the problem right there).

And now for my dillema, about 1 week ago I was able to use YouTube, and this was after Flash Player 9 had already been out and I had it downloaded. Then recently when I go to use YouTube and other sites the require Flash Player 9, I've gotten a little thing telling me that Flash 9 is not installed.

So what do I do, I go to the Adobe site and dowload Flash Player 9. Even the little message pops up that says "You have sucessfully installed Flash Player 9".

Yet when I go back to YouTube or any other site that requires Flash 9, that stupid little message still pops up and tells me that I dont have it installed.

So does anyone have any idea on how I can make the damn thing work.

Note: I did have Flash Player 9 recently, and it did work on IE, it was only untill about a week ago that it stopped working.

All help is appreciated. And if its possible I would like to not install Firefox.

Answers:
Go to the control panel, add/remove programs, and remove the flash player. Then re-download it. It happen to me as well, with the same website. My husband noticed it first. Turned out we had an older version on our computer. Well, hope this helps.