[PHP] Help with understanding an error

[Terion Miller]

Can anyone help explain what I need to do to fix this:

Error: *Warning*: mysql_fetch_object(): supplied argument is not a valid
MySQL result resource in *
C:\Inetpub\wwwroot\WorkOrderSystem\ViewWorkOrder.php* on line *57*

*Warning*: mysql_num_rows(): supplied argument is not a valid MySQL result
resource in *C:\Inetpub\wwwroot\WorkOrderSystem\ViewWorkOrder.php* on line *
65


Code:
line 57: $row = mysql_fetch_object ($result);
line 65: if (mysql_num_rows($result) == 0) {
?>
*