Juicebox-Lite has an image limit of 50 images. All 47 of your gallery images should display fine.
The problem is most likely to be an issue with the 34th image in your gallery (either a missing or corrupt file on the web server) or an issue with the gallery's 'config.xml' file.
Please double-check that the 34th image is present in the correct location on your web server.
Also, try opening the gallery's 'config.xml' file directly in your browser and, if there is an error in the XML syntax, the browser should let you know what the error is and at what line in the file the error occurs.
If you continue to experience difficulties, then please post back with a link to your gallery's web page so that I can see the problem for myself.
Once I'm able to see the problem live on your web server, I should hopefully be able to determine the exact cause of the problem and propose a solution.