Hi panavision,
The first thing to check is that xxx.php exists on the server and is in the same folder as your script. It might be an idea to put ...
include './xxx.php';
... to make explicit that that's where it should be.
The script you've pasted up ... there are quite a few bad practises in there (like using $query[tblNewsText] instead of $query['tblNewsText'], using $start instead of $_GET['start']) ... one or two unusual things (use of mysql_error(), HTML doctype with XHTML tags <br />), a few omissions (<head> ) and a few extras (</font>) :queasy:
I don't mean to be harsh, but there's a whole lot of basic debugging you could do before posting to the forum 😉
Come back if you need help knowing how to go about doing it.
Paul.