Undefined index

[procco]

I've this error:

Notice: Undefined index: 0 in /public_html/index.php on line 70

Notice: Only variable references should be returned by reference in /public_html/include/adodb/adodb-connection.inc.php on line 568

Fatal error: Call to a member function getrows() on a non-object in /public_html/index.php on line 75

Line 70:

   STemplate::assign('u_info', $u_info['0']);
        $rs->movefirst();

    $sql    = "SELECT * FROM package WHERE pack_id = " .$rs->fields['pack_id'];
    $rs     = $conn->execute($sql);
    $pack   = $rs->getrows();
    STemplate::assign('pack', $pack['0']);

line 568:

	return false;
		} else if ($this->_queryID === true) {
		// return simplified empty recordset for inserts/updates/deletes with lower overhead
			$rs = new ADORecordSet_empty();
			return $rs;
		}