Invalid or Valid because the same.

Hello, Sorry to disturb you guys of your precious programing time ;-) I'm stumped, I have coded everything properly and everything looks perfectly fine but I'm still getting error. I'm doing a lostpassword script such that when a user fills in their email, the database will check if there is such an email and then send the username\password according to the email. But when I type in a valid or an invalid email at the first time, a error\valid message will appear as normally but then, after that, what ever email I typed in (whether valid or invalid) will not show any error anymore and just clears up. I have attached a php file together with this email. I apologize if you are having to download an extra 2k with this message. Please help me out. Thank you. ------------------------------------ David Chua -------------------------------------