If you're using windows 7, it might be listed under "system security." For whatever reason, that's where I found it.
Otherwise, you can access it by right clicking on any object with flash content such as a youtube video. You'll see a drop-down menu. Scroll down and click on "Global Settings..." You should now see the "Flash Player Settings Manager" screen--the same one that's in the Control Panel.
Thanks for your help. It appeared under system security. I have done all
the settings that adobe website suggested when there is a problem watching
a video. I still get the same error message: "server not found:"rtmpt://
I have contacted the support team of the website (cengage.com) and they
said it is an issue with my flash installed on my computer. I don't know
what else to do. Please help.