Only recognizes camera when in view mode

I’m using a Canon S500, and iStopMotion only sees it when the camera is in view mode. If I click the preview button, it just downloads the first picture off the memory card. If I have the camera in camera mode, iStopMotion doesn’t see the camera at all. The compatibility list says this camera works, but I can’t seem to get it to cooperate.

I’m using Mac OS X 10.7.2 and iStopMotion 2.8.4.