Unable to load the requested class

[eluser]briang[/eluser]
I read through the information contained in the Managing your Applications link. Though didn't see anything relating to this issue.

Must the other files contained in applications/libraries/ also have the "MY_" prefix? (Or whatever it is defined as in config).

It seems I cannot load any classes except what is defined in "MY_Controller.php".

Attempting to load any other class with a different file name continually brings up this error:

An Error Was Encountered
Unable to load the requested class: whateverclassname

Thanks again for your help, InsiteFX.
Brian