well, that would mean there is a problem with the recordset to return the articles on the article.php page.
to see what the recordset SQL that is being generated is, add the following code in the body tag:
<?php echo($query_limit_BlogRS); ?>
it looks like you are using mod rewrite on this page, the rewrite rule may not be passing the expected URL variables.
the recordset is expecting URL variables named perm or id, to see what URL variable are being passed, use the following code in the body:
<?php vart_dump($_GET); ?>