Adobe Flash gone screwy...

Ok, I go to watch a YouTube video, and it says that I need the Shockwave Flash plugin. No sweat. I go to Adobe and download the YUM version. Everything is up to date. I go to watch my YouTube video, it says I still don't have my plugin, which I go to reinstall, thinking that maybe it didn't install. But it's installed. No matter how many times I restarted Firefox, I was only able to play a different video once on this Feodra install. If anyone can help, it would be nice about now :) Thanks!