[Leopold]

I think your best bet is to post a log file on the other thread. There may be some clues in the log.

Turn on debug mode, try to run the addon, upload xbmc.log to xbmclogs.com, then post the url.

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I was wondering if there is a way to trigger the addon to display the preview image?

There isn't currently a way to trigger the preview manually with this addon.

With the MJPEG Foscams I believe you can trigger a motion event through a cgi request but not with the HD cameras.