when i first ran fsx after the install it have me a prompt weather or not i wanted to run a certain software. not knowing what it was i chose "never run"
That was your mistake. If you just installed a software, and you deny it from running, you can't expect it would work...
To Undo this, Uninstall the scenery and when it asks "Do you want to remove the Addon Manager?" and "Do you want to remove the Couatl scripting engine?", reply YES to BOTH questions.
Then, reinstall the scenery, and be sure this time you allow everything that asks permission to run.