[CS3] Dynamic transition (mask) not working??

I've got a clip, clipPH2_mc, in a layer. Above that, I've got another clip, clipPH1_mc, and above that, I've got another layer with a placeholder clip, transPH1_mc. In my library, I have a movieclip which is a shape animation, with a linkage name, trans1.

What I'm trying to do is dynamically make the transition mask clipPH1_mc to reveal it, but it isn't working...any ideas??

Here's the code:

Code:

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transPH1_mc.attachMovie("trans1","transPH1_mc");
clipPH1_mc.setMask("transPH1_mc");

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And I attached the clip...

THANKS!!!

Try this:

PHP Code:

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var transPH1_mc:MovieClip = _root.attachMovie("trans1","transPH1_mc",1);
transPH1_mc.cacheAsBitmap = true;
clipPH1_mc.cacheAsBitmap = true;
clipPH1_mc.setMask(transPH1_mc); 


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Thanks for the tip...turns out I was just setting the mask before the attachMovie was finalized...once I switched it to use MovieClipLoader, a listener and onLoadInit, everything works great...

Thanks!!!