สอบถามปัญหาการ insert ข้อมูลเข้า MS sql ในรูปประโยคที่มี 's มันadd ไม่เข้าระบบครับผม

		System.Data.SqlClient.SqlConnection objConn;
		System.Data.SqlClient.SqlCommand objCmd;
		String strConnString,strSQL;

		strConnString = "Server=localhost;UID=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";

		objConn = new System.Data.SqlClient.SqlConnection(strConnString);
		objConn.Open();
		
		//*** FOR INSERT ***//
		strSQL = "INSERT INTO customer (CustomerID,Name,Email,CountryCode,Budget,Used) " +
		"VALUES (@sCustomerID,@sName,@sEmail,@sCountryCode,@sBudget,@sUsed)";
				
        objCmd = new System.Data.SqlClient.SqlCommand(strSQL,objConn);

		//*** Sample 1 ***//
		/*
        objCmd.Parameters.AddWithValue("@sCustomerID","C005");
        objCmd.Parameters.AddWithValue("@sName","Weerachai Nukitram");
        objCmd.Parameters.AddWithValue("@sEmail","[email protected]");
        objCmd.Parameters.AddWithValue("@sCountryCode","TH");
        objCmd.Parameters.AddWithValue("@sBudget","2000000");
        objCmd.Parameters.AddWithValue("@sUsed","1000000");
		*/

		//*** Sample 2 ***//
		objCmd.Parameters.Add(new SqlParameter("@sCustomerID","C005"));
		objCmd.Parameters.Add(new SqlParameter("@sName","Weerachai Nukitram"));
		objCmd.Parameters.Add(new SqlParameter("@sEmail","[email protected]"));
		objCmd.Parameters.Add(new SqlParameter("@sCountryCode","TH"));
		objCmd.Parameters.Add(new SqlParameter("@sBudget","2000000"));
		objCmd.Parameters.Add(new SqlParameter("@sUsed","1000000"));


        objCmd.ExecuteNonQuery();