prueba con mysql_fetch_array, a ver que pasa
Código PHP:
<?php mysql_select_db($database_flamuko, $flamuko);
$query_Recordset3 = "SELECT * FROM linea WHERE id_sub = '$row_Recordset2[id]'";
$Recordset3 = mysql_query($query_Recordset3, $flamuko) or die(mysql_error());
$totalRows_Recordset3 = mysql_num_rows($Recordset3);
while($sub=mysql_fetch_array($Recordset3)){?>
<tr>
<td> </td>
<td> </td>
<td colspan="2" class="descPROD"><?php echo $sub['nombre']; }?></td>