Newbie here. When I select Effect->Artistic Effects->How Wax my photo goes black.

I am having a lot of trouble even getting the effects to work, Often I apply them and nothing happens, When I try to "hot wax" as in the subject, after a long wait (on a 5Mb pic) the pic just goes black.

Why don't the effects work? I'm on windows 8.1 and am having a lot of problems. I'm afraid I'll deluge this forum with questions :)

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