Ok, then why not do this.
$sqlQuery = mysql_query("select password where username = '$username' and country = '$country' and state = '$state' and zip = '$zip'");
$rows = mysql_num_rows($sqlQuery);
if ($rows > 0) {
// Go to password info
}
else {
echo "Failed, invalid information.";
}
Also, I would consider having a email option... Rather than them putting in all that into, have them put in a email address, if the email address exists in the user database have it send the username and password to that e-mail address.
Just my thoughts.
Good luck,
-Travis