That method won't work with every template. I'm afraid you'll have to break down the template to figure out how it is built in order to change the speed. Or try change the speed in FCP, you can speed up or slow down the entire template there.
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Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
http://www.applemotion.net