TAC with SQL code in theme - does not work

Hi,
I am using the following code in my theme

$term = taxonomy_Get_term($termid);
            $tree = taxonomy_get_tree($term->vid, $term->tid);
	    $descendant_tids = array_merge(array($term->tid), array_map('_taxonomy_get_tid_from_term', $tree));
            $sql = "SELECT n.title, n.nid FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid IN (". implode(',', $descendant_tids) .") AND n.status=1 ORDER BY n.created DESC";
            $result = db_fetch_object(db_query_range(db_rewrite_sql($sql), 0, $count));
            print "<div class='text'><h4>".$term->name."</h4>";
            if ($result) {
               print "<a href='".url("node/".$result->nid)."'>".$result->title."</a>";

If I enable taxonomy access control with this code, then my site stops displaying results for this code. I get the following errors in my log

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DISTINCT(n.nid) FROM node n INNER JOIN term_node tn ON n.nid = tn.nid INNER JOI' at line 1 query: SELECT n.title, DISTINCT(n.nid) FROM node n INNER JOIN term_node tn ON n.nid = tn.nid INNER JOIN node_access na ON na.nid = n.nid WHERE (na.grant_view >= 1 AND ((na.gid = 0 AND na.realm = 'all'))) AND ( tn.tid IN (8,9,11,12,13,39) AND n.status=1 ) ORDER BY n.created DESC LIMIT 0, 1 in /home/website/public_html/includes/database.mysql.inc on line 172

does someone know how I can fix this?