The upload directory is not writable: uploads won\'t work in your form.' .'
Use your FTP software to set the permission to 755 on the directory '.$dir_install_contactform.'/upload to solve this problem.' .'
Set the permission to 777 if it does not work otherwise. If your website is installed on a Windows based server, you must make the directory writable.' .'
If there is no upload directory inside the '.$dir_install_contactform.' folder, use your FTP software to create it and set it with the permissions mentionned above (755 or 777).' .'