สอบถามการใช้ PDO prepare query ข้อมูล sql server COUNT field incorrect or syntax error

$txtKeyword = "%".trim(PDO::quote($_POST['txtKeyword']))."%";

$stmt->bindParam(':txtKeyword', $txtKeyword, PDO::PARAM_STR);

$txtKeyword = $_POST['txtKeyword'];
//...
$stmt->bindValue(':txtKeyword', '%'.$txtKeyword.'%', PDO::PARAM_STR);

$query = "SELECT * FROM table1 WHERE (column1 LIKE :txtKeyword OR column2 LIKE :txtKeyword) ORDER BY columnid DESC";
echo $query;

$stmt = $conn->prepare("
SELECT * FROM table1 
WHERE concat(column1, column2) LIKE :txtKeyword 
ORDER BY columnid DESC");
$stmt->bindParam(':txtKeyword', $txtKeyword);

$query_contact = $conn->prepare("SELECT * FROM EMCustContact WHERE CustID=':CustID'");
                    $query_contact->bindParam(':CustID',$CustID);
                    $query_contact->execute();