ติดการ update ของ mysqli ดึงมาโชว์แต่ ไม่อับเดดให้คะ

    <div class="modal fade " id="edit<?php echo $row['WarningNoticeID']; ?>" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"  > 
        <div class="modal-dialog " >
            <div class="modal-content" style="font-size:12px;">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                    <center><h4 class="modal-title" id="myModalLabel">Edit</h4></center>
                </div>
                <div class="modal-body">
				<?php
					$edit=mysqli_query($conn,"select * from warning_notice where WarningNoticeNO ='".$row['WarningNoticeNO']."'");
					$erow=mysqli_fetch_array($edit);
				?>
				<div class="container-fluid" >
                
				<form method="POST" action="edit_warning.php?WarningNoticeNO=<?php echo $erow['WarningNoticeID']; ?>" >

					<div class="row">
						<div class="col-lg-2" align="left">
							<label style="position:relative; top:7px;">No</label>
						</div>
						<div class="col-lg-10">
							<input type="text" name="WarningNoticeNO" class="form-control" value="<?php echo $erow['WarningNoticeNO']; ?>">
						</div>
					</div>
					<div style="height:10px;"></div>
					<div class="row">
						<div class="col-lg-2" align="left">
							<label style="position:relative; top:7px;">B</label>
						</div>
						<div class="col-lg-10">
							<input type="text" name="Balance" class="form-control" value="<?php echo $erow['Balance']; ?>">
						</div>
					</div>
					<div style="height:10px;"></div>
                    <div class="row">
						<div class="col-lg-2" align="left">
							<label style="position:relative; top:7px;">S</label>
						</div>
						<div class="col-lg-10">
							<input type="text" name="PaymentStatus" class="form-control" value="<?php echo $erow['PaymentStatus']; ?>">
						</div>
					</div>
					<div style="height:10px;"></div>
					<div class="row">
						<div class="col-lg-2" align="left">
							<label style="position:relative; top:7px;">D</label>
						</div>
						<div class="col-lg-10">
							<input type="text" name="PaymentDate" class="form-control" value="<?php echo $erow['PaymentDate']; ?>">
						</div>
					</div>
                  

                </div> 
				</div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default" data-dismiss="modal"><span class="glyphicon glyphicon-remove"></span> Cancel</button>
                    <button type="submit" class="btn btn-warning"><span class="glyphicon glyphicon-check"></span> Save</button>
                </div>
				</form>
            </div>
        </div>
    </div>

	$id=$_POST['WarningNoticeID'];
	
	$WarningNoticeNO=$_POST['WarningNoticeNO'];
	$Balance=$_POST['Balance'];
	$PaymentStatus=$_POST['PaymentStatus'];
	$PaymentDate=$_POST['PaymentDate'];
	$Date_made = date("Y-m-d");
	$Time_made = date("H:i:s");
	
	mysqli_query($conn,"update warning_notice set WarningNoticeNO='$WarningNoticeNO', Balance='$Balance', PaymentStatus='$PaymentStatus', PaymentDate='$PaymentDate', Date_made='$Date_made', Time_made='$Time_made' where WarningNoticeNO='$id'");
	header('location:index_warning_notice.php');