According to your gallery's XML file, the first image in your gallery should be located here: http://www.jimbostudio.com/Clients/SV/images/006.jpg
However, going directly to that location in a browser (bypassing SimpleViewer) results in an error 404 (file not found).
It looks like the images have not been uploaded to your web server (at least not to the correct location).
Please check that you have uploaded the images to the correct location on your web server and check that their permissions (and the permissions of the folders they are in) are not too restrictive. Default permissions of 755 for folders (the 'images' and 'thumbs' folders) and 644 for files (the image files themselves) should be fine. You can check and change permissions using an FTP program such as Filezilla or via your web hosting account's online File Manager.
Also, please see this FAQ for two other possible reasons why your images may not be displaying:
My images show locally, but not when I upload them to my webserver. What are possible problems?
SimpleViewer Support Team