PHP mysql_fetch_array

error : mysql_fetch_array() expects parameter 1 to be resource, boolean given in /home/vicky/public_html/news/adminweb/content.php on line 69

code dari line 64 - 71

$tampil=(mysql_query("SELECT * FROM berita,komentar WHERE komentar.id_berita=berita.id_berita
	                     ORDER BY id_komentar DESC LIMIT 5");
	}

	$no = $posisi+1;
	while($r=mysql_fetch_array($tampil)) {
	  $tgl = tgl_indo($r[tgl]);
	if($r[aktif]=='N'){