redirecting to old page when error occured with error message on top of form

[thread_PHP]

Hi all
I have a problem i need to display error when the data insertion leads to erronius input on the top of the same page. I wrote following but not working till i press back button

pLESE TELL ME HOW TO DO IT

	$insqry1="insert into blue_insuranceclaim(insurance_compname,company_url,phone1,phone2,email) values('".$compname."','".$website."','".$phone1."',".$phone3.",'".$email."')";

//echo $insqry1;die;
	$insertcoupon = $db->Execute($insqry1);
	if(mysql_error())
	{
		$_SESSION['errMessage']="Please enter correct values";

	header("Location: addclaimpage.php");
}

THANKS IN ADVANCE