Your gallery seems to use the SimpleViewer-Pro 'simpleviewer.swf' file but the SimpleViewer-Standard 'simpleviewer.js' file (a mixture of files from the Standard and Pro 'svcore' folders).
Also, neither of these files are actually located within an 'svcore' folder.
You should leave the 'svcore' folder intact and follow the embedding instructions here.
If you are using the WYSIWYG Web Builder extension, simply swap the 'svcore' folder in the extension with the 'svcore' folder from the SimpleViewer-Pro download package ('simpleviewer_pro_231/web/svcore/') before creating your gallery.
Once your gallery uses the complete Pro 'svcore' folder, if you would like your gallery to AutoPlay on loading, set autoPlayOnLoad="TRUE" in your gallery's XML file: http://www.hershphoto.com/gallery.xml
SimpleViewer Support Team