You have an error in your SQL syntax; แปลว่าอะไรครับ

<?php 
require_once('connections/msm.php'); 
session_start();

					//	$home = date("d-m-Y");     
					//	$today = date("Y,m,d");
						
	     if(isset($HTTP_POST_VARS["Submit"])=="Register"){
		 
		   //==================== ตรวจสอบชื่อ Username ซ้ำ
		mysql_select_db($database_msm, $msm);
		$query_chk="select * from  users where passwords like '$mpass'";
		$result_chk= mysql_query($query_chk, $msm) or die(mysql_error() . "<br />" . $sql);
		
		$num=mysql_num_rows($result_chk);
		if($num<>0){
			   echo("<SCRIPT>alert ('PASSซ้ำ');</SCRIPT>"); print "<meta http-equiv='refresh' content='0;URL=peer_register.php'>"; exit(0);
			   
		}else
	  	mysql_select_db($database_msm, $msm);            
		$sql_gentid = "select  MID from users order by MID desc" ;
		$result_tid = mysql_query($sql_gentid,$msm) or die(mysql_error() . "<br />" . $sql);
		$num_result  = mysql_num_rows($result_tid) ;
		if($num_result == 0)
			  {
					$retype_id = "PEE0001" ;		
					
			  }
			else
			  {
					$dbarr_gentid = mysql_fetch_assoc($result_tid);
					$gen_type_Id = trim(substr($dbarr_gentid['MID'],3));
					$type_db = $gen_type_Id+1 ; // นำค่า id มาเพิ่มให้กับค่ารหัสสมาชิกครั้งละ1
			
							
								if($type_db>=100) {
								$type_in = "0$type_db" ;
								}
								else
								 {
							if($type_db >=10) 
								{
								$type_in = "00$type_db" ;
								}
							else
								{
								$type_in = "000$type_db" ;
								}
					}
					
					$retype_id = "PEE$type_in" ;		
		}
		//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
		mysql_select_db($database_msm, $msm);            
		$sql_gentid2 = "select PID from peer order by PID desc" ;
		$result_tid2 = mysql_query($sql_gentid2,$msm) or die(mysql_error() . "<br />" . $sql);
		$num_result2  = mysql_num_rows($result_tid2) ;
		if($num_result2 == 0)
			  {
					$retype_id2 = "PERCU0001" ;		
			  }
			else
			  {
					$dbarr_gentid2 = mysql_fetch_assoc($result_tid2);
					$gen_type_Id2 = trim(substr($dbarr_gentid2['PID'],5));
					$type_db2 = $gen_type_Id2+1 ; // นำค่า id มาเพิ่มให้กับค่ารหัสสมาชิกครั้งละ1
			
							if($type_db2>=100) {
								$type_in2 = "0$type_db" ;
								}
								else
								 {
							if($type_db2 >=10) 
								{
								$type_in2 = "00$type_db" ;
								}
							else
								{
								$type_in2 = "000$type_db" ;
								}
					}
					
					$retype_id2 = "PERCU$type_in" ;		
		}
		//=======================	Username ไม่ซ้ำ ลงทะเบียนได้
			$status="2";
			$encodedate = $datevalue;
						    $d_day =substr($encodedate,-2);; //วัน
							$m_mouth =substr($encodedate,-5,-3); //เดือน
							$y_year =substr($encodedate,-10,-6); //ปี          
			$decodedate = "$y_year$m_mouth$d_day";
			$query_reg="insert into peer (PID,age,sex,province,amphur,district,hospital,history,detail1,detail2,status,picture,mon,montime1,montime2,montime3,montime4,monother,tue,tuetime1,tuetime2,tuetime3,tuetime4,tueother,wed,wedtime1,wedtime2,wedtime3,wedtime4,wedother,thu,thutime1,thutime2,thutime3,thutime4,thuother,fri,fritime1,fritime2,fritime3,fritime4,friother,sat,sattime1,sattime2,sattime3,sattime4,satother,sun,suntime1,suntime2,suntime3,suntime4,sunother,email,lineid,tel) values ('$retype_id2 ','$mage','$msex','$mprovince','$mamphur','$mdistrict','$mhos','$mhistory','$mability1','$mability2','$fileupload','$mon','$montime1','$montime2,'$montime3','$montime4','$monother','$tue','$tuetime1','$tuetime2','$tuetime3','$tuetime4','$tueother','$mtelaccess','$memail','$today')";
			$confirm= mysql_query($query_reg, $msm)  or die(mysql_error() . "<br />" . $sql);
			//mysql_query("SET NAMES UTF8");
			$SetEnv = "SET NAMES 'tis620' ";
mysql_query($SetEnv);
					 if(!$confirm)
													{
														echo "ไม่สามารถทำการ Query  peer ได้";
													}
									
			///////////////////////////////////////////////////---------------------user-----------------/////////////////////////////////////////////////////////
					else
					{
			
			$query_reg2="insert into users (MID,passwords,name,surname,status) values ('$retype_id2','$pass','$mfname','$mlname','$status')";
			$confirm2= mysql_query($query_reg2, $msm)or die(mysql_error() . "<br />" . $sql);
			//mysql_query("SET NAMES UTF8");
			$SetEnv = "SET NAMES 'tis620' ";
mysql_query($SetEnv);
					 if(!$confirm2)
													{
														echo "ไม่สามารถทำการ Query Users ได้";
													}
				 	  else
													echo "<meta http-equiv='refresh' content='0;URL=confirm_peer.php'>";
	 }
	 }
?>