ActionScript 3.0 :: Call A Button Inside A MovieClip, With Names Stored In Arrays

I have an Arrays that contains the names of MovieClips:

Code:
var MyMCs:Array = ["A","B","C","D","E"];

The actual MovieClips names are "MC_A", "MC_B", etc..., I use this method so I reuse the same Array for multiple tasks, I simply add what ever it's needed to the name to match the task at hand. On this case I add "MC_".

Then I have multiple Arrays, with the same names of the values of MyMCs. The values of each these Arrays are the names of buttons that are inside the movieclips of MyMCs:

Code:
var A:Array = ["RR","TT"];
var B:Array = ["YY","UU"];
etc...

I could add a listener to a button this way:

Code:
MC_A.YY.addEventListener(MouseEvent.CLICK, DoSomething)

My problem is that i want it to be done dynamically, using the Arrays values in a loop to add Listeners to the all buttons. The loop system is not a problem for me... my real problem is in the dynamic attribution itself.
Here is what I have:

Code:
//'i' and 'j' have previously been created
for(i=0; i<MyMCs.length; i++){
for(j=0; j<this[MyMCs[i]].length; j++){

[Code]....

I know that this is correct since I tried them separately and I can trace the proper values.

I know that my problem is in the "this" since I get an error message stating:
1084: Syntax error: expecting identifier before this.

I suppose it should state something else... I tryed with "root", "parent", "child", "MovieClip"... with no luck...