I have changed: "<?php require_once("WA_DigitalFilePro/HelperPHP.php"); ?>"
Now only it indicates the errors, does not teach any more of the page, before it taught to the errors and the rest of the page.
Errors:
Warning: require_once(WA_DigitalFilePro/HelperPHP.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/vhosts/andana.cat/httpdocs/Clients/Upload2.php on line 5
Fatal error: require_once() [function.require]: Failed opening required 'WA_DigitalFilePro/HelperPHP.php' (include_path='.:.:.:') in /var/www/vhosts/andana.cat/httpdocs/Clients/Upload2.php on line 5