SQL PHP Update/Delete/Add

[LingoOutsider]

This is my code so far for updating...

$namereq = $_REQUEST['namefield'] ;
$emailreq = $_REQUEST['emailfield'] ;
$messagereq = $_REQUEST['messagefield'] ;
$datereq = $_REQUEST['datefield'] ;

$con = mysql_connect("server", "username", "password");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  echo "update failed";
  }

mysql_select_db("database", $con);
global $customernumber;

mysql_query("UPDATE enquiryform SET name=$namereq WHERE customerno = $customernumber LIMIT 1");
mysql_query("UPDATE enquiryform SET email=$emailreq WHERE customerno = $customernumber LIMIT 1");
mysql_query("UPDATE enquiryform SET message=$messagereq WHERE customerno = $customernumber LIMIT 1");
mysql_query("UPDATE enquiryform SET startdate=$datereq WHERE customerno = $customernumber LIMIT 1");

mysql_close($con);

echo $namereq
echo $emailreq
echo $messagereq
echo "Update Compleated"; 

$_REQUEST['field'] have been retreved for previous page and everything echos/prints ok but nothing changes on the database table?!
I've checked field/database/passwords/etc what am I missing?