[rake]

here's where your error is:

$post = mysql_query("SELECT * FROM post WHERE post.userid='90' ORDER BY dateline ASC LIMIT 1");

compared to what i wrote...

$post = $DB_site->query_first("SELECT * FROM post WHERE postuserid='$user[userid]' ORDER BY dateline ASC LIMIT 1");

note the "query_first"... you'll need to use an additional mysql_fetch_array there to fetch the first (and only) row. after that it'll probably work.