AS3 Loader class: Error #1006: load is not a function. WHY?

Hello,

Running Flash CC on a borrowed Macbook Air.  I've been using AS3 for years, and haven't run into this.  I've looked all over and I'm not finding my particular issue anywhere.

All of the examples of AS3 image loading that I've seen are some variation of what I'm doing. It should be very straightforward:

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import flash.display.Loader;

var my_loader:Loader = new Loader();

my_loader.load(new URLRequest("img/phone.png"));

stage.addChild(my_loader);

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When I publish, I receive this error: Error #1006: load is not a function.

Thanks!