ช่วยดูให้ทีครับ พอดีเจอ Err #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '$_POST["stxtStu"] = "ce355"' at line 1

<?php
	$objConnect = mysql_connect("localhost","root","root");
	$objDB = mysql_select_db(".........");

	$strUsername = $_POST["stxtStu"];
	$strPassword = $_POST["stxtName"];
	$strStr = $_POST["stxtroom"];
	$strStu_id = $_POST["stxt_s"];
	$strName = $_POST["stxt_Term"];
	$strlastname = $_POST["stxt_Year"];
	$strEmail = $_POST["stxt_C"];

	/*** Check Email Exists ***/
	$strSQL = "SELECT * FROM subject WHERE Sub_ID = '".$strUsername."' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
		$arr['StatusID'] = "0"; 
		$arr['Error'] = "รหัสวิชานี้ได้มีการเพิ่มไปแล้ว !! ";	
		echo json_encode($arr);
		exit();
	}
	/*** Insert ***/
	$strSQL = "INSERT INTO subject (Sub_ID,Sub_name,Class,Teacher,Color,Term,Year) 
		VALUES (
			'".$strUsername."',
			'".$strPassword."',
			'".$strStr."',
			'".$strStu_id."',
			'".$strEmail."',
			'".$strName."',
			'".$strlastname."',
			)
		";
		$objQuery = mysql_query($strSQL);
	if(!$objQuery)
	{
		$arr['StatusID'] = "0"; 
		$arr['Error'] = " !!";	
	}
	else
	{
		$arr['StatusID'] = "1"; 
		$arr['Error'] = "";	
	}
	/**
		$arr['StatusID'] // (0=Failed , 1=Complete)
		$arr['Error'] // Error Message
	*/
	mysql_close($objConnect);
	echo json_encode($arr);
?>