you have a number of console errors getting logged. they might be a permissions issue, or a file not found problem.
install the developer tools for your chosen browser; look at the console; and you can see what i mean. i like to address those issues prior to moving forward on other things.
with regards to the zooming problem, i would try re-adding that image. the image the zoom is looking for is this:
http://criticalsystemsincshop.com/im...003-00_MED.jpg
and that image does not exist on your system.
good luck!
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