the fix for the deprecated function error is to change:
$WA_ddsArray = split("/", $WA_thisFile);
to:
$WA_ddsArray = explode("/", $WA_thisFile);
this error should be fixed in newer version of menu writer.
code for displaying error is:
<?php
error_reporting(E_ALL);
ini_set('display_errors','on');
?>
if there is still no error showing on the page, contact the host to see if they can investigate the PHP servers error log to track the error down.