Hmm my account here seems to have been locked, sorry can't help atm but try this anyhow:
<?php function renderXepherNewsbox() { include "/home/httpd/htdocs/newsbox.php"; } renderXepherNewsbox(); ?>
Now to explain what this is doing. Since you're including the script on a global level, it's (re)defining the variables in that script on a global level. What I did was wrapped it in a function, which should make the variables exclusive to that function alone, keeping the global values safe.