Cutscene not working???

I've recently learned how to put a short movie on Unity 3D, but I had an error witch means that I didn't install Quicktime. So, I got to apple.com and downloaded Quicktime with the latest version. I got back to Unity when my download was finished and STILL it was saying that I need to download Quicktime, so I've installed it again, and I keep getting this message. And yes, I'm using Unity Pro. I wouldn't be able to import videos if I had the free version.

If you guys have any ideas how to solve this problem (or bug), please post an answer below! I would appreciate your support :)

Thanks!

~crusherxman