Cannot write in the folder <font color=red><b>phpMyVisites root (/home/av/www/stats/ OR/AND (if exists) /home/av/www/stats//datas/tpl_compiled)</b></font> : please verify that you have the rights necessary to create files on the server (try to CHMOD 777 the folder with your FTP software (right click on the directory -> Permissions (or CHMOD)).