update + mysql_affected_rows problem.

<?php

if(!isset($_REQUEST['jobID'])) {
header("Location: jobs.php");
exit;
}

require("includes/config.inc.php");
require("includes/functions.inc.php");
connect($mysql_host, $mysql_user, $mysql_pass, '******');

$jobID = $_REQUEST['jobID'];

$sql = "update sv_jobs set click_count + 1 where id = $jobID";

$result = mysql_query($sql);

if(mysql_affected_rows($result) == 1) {
echo "Success!";
}
else {
echo "Error!";
}

?>

får følgende fejl

Warning: mysql_affected_rows(): supplied argument is not a valid MySQL-Link resource in C:\Apache2\htdocs\******\read_job.php on line 18
Error!

Nogle der ved hvor det er galt?? For kan ikke lige overskue den. :(