Actionscript 3 - Unable To Get Proper Class From Flash IDE

I'm trying to replace instances created by dragging and dropping into a MovieClip through Flash's IDE with actual classes so I can add them to a game loop and have them as actual entities. In other words, I'm trying to create a streamlined way to allow developers to visually add their entities to a platforming engine I'm working on.

This is my third attempt at it and I'm completely stuck.The code below loops through a movieclip that contains an exported symbol with a class linked to it named MyEntity. However, it loses its extension to BaseClass and thus doesn't move when compiled.

It inherits: MovieClip > BaseClass > MyEntity. However when compiled with the IDE it ignores BaseClass and just does MovieClip > MyEntity.

My code is designed to find and store the position of MyEntity, remove it from the container movieclip, add a brand new instance of it (with the base being proper) then set that new instance to the same position of the original.

for ( var i:int = 0; i < LayerInIDE.numChildren; i++ )
{
// first we want to get all the display objects in the layer
// these are objects that were placed from within the Flash IDE (ie. dragged and dropped into the MovieClip
var original:DisplayObject = LayerInIDE.getChildAt( i );

[code]....

This does not work.

It outputs Game.entities::MyEntity [class MyEntity] false. MyEntity is a proper class and DOES extend from BaseClass. However, the issue is the IDE weirdly removes the reference to the base class - as if MyEntity never had a base class. I cannot seem to recreate it as getting the reference to the class also returns that MyEntity never had a BaseClass. However, if I type in var newEnt = MyEntity(); instead of getting the class name through getDefinitionByName it works normally and extends from BaseClass.I need it to extend from BaseClass as that is the main class all entities in my game engine require to use.