Whats wrong with this function (help me !)

[TheStalker]

Hi all could someone please help me out with this function please

I have no code before this at the top of my page.

function usedEmail($emailad)
{
  $used = mysql_query("SELECT* FROM users WHERE email ='".$emailad."' ");
  if (mysql_num_rows($used) ==0)
  	{
  		return false;
	}
	else
	{
		 return true;
	} 
}
if (usedEmail($_POST['email']) == false)
{
	header("Location: signUp.php?e=ue");
	exit;
}

i get this error

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:\xampp\htdocs\signUpComplete.php on line 5

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\signUpComplete.php:5) in C:\xampp\htdocs\msnandonline\signUpComplete.php on line 16

if anyone could help id be very greatful !

thanks

[laserlight]

Perhaps you simply forgot to connect to the database server and select the database.

[TheStalker]

opps............thank you very much again....maybe i need a break lol