thank you for you support.

As my host don't offer custom php.ini, if i make a modification in htaccess with php_value or php_admin_value, i found an internal error 500.

So, i changed $sql = "UPDATE `process_queue` SET
status='2' , file ='$file_name' WHERE `id`=$vid";
mysql_query($sql) or mysql_die($sql);

to the line 91 of functions_upload.php

and now it works perfectly.

Thanks