Problem with pass results function

[klik]

function pass_results()
{


/* Username error checking */
	if ($_POST['user'] == "") {
		echo "<font color=\"#FF3300\">Please enter your username</font><br><br>"; 
		return false;
	}

if ($_POST['email'] == "") {
	echo "<font color=\"#FF3300\">Please enter your email address</font><br><br>"; 
	return false;
}

$username = $_POST['user'];
$email = $_POST['email'];

/* Let's strip all HTML and avoid encapsulated letters. */

	$username = strip_tags($username);
	$email = strip_tags($email);	


/* Ensure username is in database */

$result = mysql_query("SELECT * FROM cms_users WHERE username = '$username'");
$result2 = mysql_query("SELECT * FROM cms_users WHERE email = '$email'");

if(mysql_num_rows($result) == 0){
	echo "<font color=\"#FF3300\">User <b>$username</b>, does not exist</font><br><br>";
	return false;
}

elseif(!validate_email($email)){
	echo "<font color=\"#FF3300\">Please provide a valid email address</font><br><br>";
		return false;
}

elseif(mysql_num_rows($result2) == 0){
	echo "<font color=\"#FF3300\">Email not registered on system </font><br><br>";
	return false;
}

Here is the first section of my code for this function. No matter what I do, it tells me the username does not exist when it clearly does and tells me the mysql_num_rows(): supplied argument is not a valid MySQL result resource. The values are getting posted correctly.

[dewen]

I can't see problems. But you should put following lines for debug:

	if( $errors = mysql_error() ){
		echo $errors."<BR>";
		exit;
	}

afer mysql_query