Ciao a tutti
ho un problema con queste query correlate:

$query = "SELECT * FROM contabilita ORDER BY data_cassa ";
$result=mysql_query($query);
while($row=mysql_fetch_array($result)){
?>

<tr>

<td><?php echo $row['data_cassa']; ?></td>

<td><?php echo $row['id_locale']; ?></td>

<td><?php $query1 = "SELECT * FROM causale WHERE id_causale ='".$row['id_causale']."'";

//$row1 = mysql_fetch_array($query1);

while($row1=mysql_fetch_array($query1)){

echo $row1['causale'];

}
?>


purtroppo mi restituisce quest'errore:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /sito/contabilita/index.php on line 55

fs vods può dipendere?