Your server can not handle them that would appear.
Depending on you Apache version you would need to edit your server config file httpd.conf and add something like this but then that requires you to have full access to the server setup which most people do not have.
this don't work. I installed the soft and worked ok but when I moved the directory of the vb to the root folder something has changed because now I have this error. Or maybe it's a problem with the vbSEO...
Not all servers handle seo urls in photopost. For example windows does not use apache therefore windows servers do not use the info posted above. Nor can you do htaccess on a windows server etc.