Your problem is you do not understand the arguments to stringTTF - you are placing your test in a position outside your image. Try:

$im->stringTTF($black,"c:/windows/system/hudson2.ttf", 12, 0, 0, 20,"Font Reactor") or die $!;

and consider that the point (0,0) is at the top left of the image.

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I'd like to be able to assign to an luser