[AS2] Variables Question

[color=slategray]I have a simple question about Variables in AS2, i have a feeling the solution is pretty simple. What i exactly need is a variable that has a movieclip’s name stored inside it. I created a variable called cardType and stored the moviecip’s name inside it. Now when i declare the Tween you see below and assign it to the variable cardType (which should be replaced with the movieclip’s name), it does not work.

I’m not sure if i should be using variables for this, but if you get my idea please do let me know what would the correct approach be.

var CardType;
CardType = LondonQuestions_mc.redCard_mc;

new Tween(cardType, "_alpha", Strong.easeOut, 0, 100, 2.5, true);

Thanks![/color]