What does that mean?

[zzz]

I tried to install a script and got this in a few places pointing out to the same file:

Warning: Supplied argument is not a valid MySQL result resource ....

And here's the line it pointed to:

case "MySQL":
    $row = mysql_fetch_row($res);
    return $row;
break;;

Nothing looks wrong to me. Any ideas where shall I start?

[intenz]

Try this...

$ple = 'MySQL';
switch($ple)
{
	case 'MySQL':
		$row = mysql_fetch_row($res);
		return $row[0];
		break;
}