Help needed

Sooo, i've been trying to add a Custom sprite sheet to an AS3 client, but im getting the Error "Instantiation attempted on a non-constructor"
I don't know what this Error means nor why it exists. Could anybody explain me How to Fix/What this Error Means, i really Appreciate it.

Wg - Damian007

What steps and what files did you edit?

I used The leaked FSOD Client and Edited "EmbeddedAssetsLoader", and "_0vi"
i also added a sprite sheet and a new Actionscript File for the Sprite Sheet.
I know the FSOD client is hard to code, but the way you add sheets should be very same there