Index: linktocontent_node.module
===================================================================
--- linktocontent_node.module	(revision 127)
+++ linktocontent_node.module	(working copy)
@@ -238,13 +238,19 @@
   $term = taxonomy_get_term($tid);
   $tree = taxonomy_get_tree($term->vid, $tid, -1, 0);
   $descendant_tids[] = array_merge(array($tid), array_map('_taxonomy_get_tid_from_term', $tree));
-
   $str_tids = implode(',', call_user_func_array('array_merge', $descendant_tids));
   $join = 'INNER JOIN';
   $where = 'tn.tid IN ('. $str_tids .')';
   if ($tid < 0) {
     $join = 'LEFT JOIN';
-    $where = 'ISNULL(tn.tid)';
+	  switch ($GLOBALS['db_type']) {
+	    case 'mssql':
+				$where = 'tn.tid IS NULL';
+				break;
+			default:
+				$where = 'ISNULL(tn.tid)';
+				break;
+		}
   }
   $sql = 'SELECT DISTINCT(n.nid), n.type, n.title, n.created, n.changed, n.sticky, u.name, tn.tid FROM {node} n INNER JOIN {users} u ON u.uid = n.uid ';
   $sql .= $join .' {term_node} tn ON n.nid = tn.nid WHERE '. $where .' AND n.status = 1 ORDER BY '. $order;
@@ -262,4 +268,4 @@
     }
   }
   return $result;
-}
+}
\ No newline at end of file