Compare Array with xmlList

Greetings please think about the following situation

i have an array
var myArray:Array = new Array(a,b,c,d,e,f,g,h);
a xml list:
var myList:XMLList = // this has b,e,g,h
So both lengths can vary. Theres no actual length given, it just changes over time.

Now the array are movieclips positioned on stage.
I’d love to check if the items on stage can be found in the xmlList
if true, then I add an eventListener, if false, nothing has to happen, except an alpha fade.

I tried various things, but i just can’t get it to work.
Can someone shed a light on this please? I’d like to use this in a for loop, as the real list & array is over 40 movieclips. and has to be retriggered every so often.

it must be something obvious i am overlooking. Maybe I am just tired. Its been a long busy day. Sorry if this has been asked before, I search but didn’t really found a solution.
Thanks for any help.
Best regards