error with get_mail.php

Hi

I am using postie 1.5.15 with the last wp version 3.6

When i run http://www.url.com/wp-content/plugins/postie/get_mail.php. The content of the page was blank but if i see the file /public_html/wp-content/plugins/postie/error_log

The content that generated get_mail.php was in the log file

What can i solve that?

Thanks

Regards
Manuel

http://wordpress.org/plugins/postie/