PHP MySQL ทำการ UPDATE ฐานข้อมูลไม่สำเร็จค๊ะ

$objConnect = mysql_connect("localhost","root","root") or die("Error Connect to Database");
$objDB = mysql_select_db("mydatabase");
$strSQL = "UPDATE customer SET ";
$strSQL .="CustomerID = '".$_POST["txtCustomerID"]."' ";
$strSQL .=",Name = '".$_POST["txtName"]."' ";
$strSQL .=",Email = '".$_POST["txtEmail"]."' ";
$strSQL .=",CountryCode = '".$_POST["txtCountryCode"]."' ";
$strSQL .=",Budget = '".$_POST["txtBudget"]."' ";
$strSQL .=",Used = '".$_POST["txtUsed"]."' ";
$strSQL .="WHERE CustomerID = '".$_GET["CusID"]."' ";
$objQuery = mysql_query($strSQL);