Several wordpress websites gone blank

Hello,

Since a few days the 3 wordpress websites I host at blue host have gone blank.
The sites have been running for a few months, and nothing changed the last weeks.
Now i tried adding a logging area with the following code:

<?
ini_set('display_errors','1');
ini_set('display_startup_errors','1');
error_reporting (E_ALL);include('index.php');
?>

running at http://www.nickraeven.com/tester.php

Can someone please help me?
Thank you!