ใน localhost รันได้แต่ในโฮสจริง แจ้ง error in your SQL syntax ช่วยแก้ไขหน่อยค่ะ

<?
	$name = $_REQUEST['name'];
	$detail = $_REQUEST['detail'];
	$file = $_FILES['pic'];
	$file_name = $file["name"];
	$file_size = $file["size"];
	$file_type = $file["type"];
	$file_path = $file["tmp_name"];
include("connectdb.php");
$is_upload=true;
if($file_size <= 0){
$is_upload =false;
$sql = "UPDATE act SET name='$name',detail='$detail' WHERE act_id = $act_id";
mysql_query($sql)or die(mysql_error());

}else if($file_size > 1000*1024){
$is_upload =false;
echo "file size too big<br />";
echo "<a href='act_edit_form.php'>Upload Again</a>";
}

if($is_upload){
	// 2 upload pic
	$type ="";
	if($file_type == "image/pjpeg"){
		$type = "jpg";
	}else{
		$type = "gif";
	}
	$fileupload = "images/$act_id.$type";
	move_uploaded_file($file_path,$fileupload);
				
		$sql = "UPDATE act SET pic='$fileupload' WHERE act_id = $act_id";
		mysql_query($sql)or die (mysql_error()) ;
	}
	$sql = "UPDATE act SET name='$name',detail='$detail' WHERE act_id = $act_id";
	mysql_query($sql)or die(mysql_error());

		include("disconnectdb.php");
?>