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OK, I just tried it out on a 2.5 alpha install and got the same error. Seems to be something that was introduced in 2.4.4 that is causing this, since I can run it just fine in 2.4.3.
Just to confirm, sarahmx, are you running 2.4.4 too?
I will investigate further tonight and report back.
EDIT: Couldn't wait. It was the global module handler that wasn't working. Fixed it now. Please download from original link and try again.