Animation not playing when returning to a previous loaded scene

When I start my app, I have a animation the plays in the menu screen. This animation works great when it is first loaded upon opening the app, however, when I try to load the menu during any level of the game, the animation no longer plays in the menu screen. How can I fix this? Someone asked this question a few months ago and it never got answered. Thanks for any help. http://answers.unity3d.com/questions/34565/animation-not-playing-when-returning-to-a-previous.html