Canon EOS 7d live preview...

…or more precisely No live preview.

It says that the 7d is supported in the list of cameras. I just get a message saying no live preview for the device. Am I doing something wrong?

It would be great to know this works before I purchase. The live preview function works in the trial version of Dragonframe so I’m pretty sure it’s not my camera.

Thanks in advance

What version of iStopMotion are you running?