I'm getting Forbidden error - php

Question

I have a board_directors.php page,
When I update my page from admin panel, It' showing
Forbidden
You don't have permission to access /new/admin/board_directors.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Here has 6 form fields and 2 textarea field.
and my code is:
if(isset($_REQUEST['submitted']) && $_GET['edit'] == "yes"){
$id = $_GET['id'];
$yes = $_GET['edit'];
$dir_sl = $_POST['dir_sl'];
$dir_name = $_POST['dir_name'];
$dir_position = $_POST['dir_position'];
$dir_email = $_POST['dir_email'];
$dir_mobile = $_POST['dir_mobile'];
$dir_details = $_POST['dir_details'];
$file2 = $_FILES['file']['name'];
if(!empty($file2)){
$file = $_FILES['file']['name'];
// Uploade Image Directory start
$add="board_directors_images/".$_FILES['file']['name']; // the path with the file name where the file will be stored, upload is the directory name.
//echo $add;
if(move_uploaded_file ($_FILES['file']['tmp_name'],$add)){
//echo "Successfully uploaded the image";
chmod("$add",0777);
}
///////// Start the thumbnail generation//////////////
$n_width=100; // Fix the width of the thumb nail images
$n_height=140; // Fix the height of the thumb nail imaage
////////////////////////////////////////////
$tsrc="board_directors_images/thumb/".$_FILES['file']['name']; // Path where thumb nail image will be stored
/////////////////////////////////////////////// Starting of png thumb nail creation///////////
if (#$_FILES['file']['type']=="image/png")
{
$im=ImageCreateFrompng($add);
$width=ImageSx($im); // Original picture width is stored
$height=ImageSy($im); // Original picture height is stored
$n_height=($n_width/$width) * $height; // Add this line to maintain aspect ratio
$newimage=imagecreatetruecolor($n_width,$n_height);
imageCopyResized($newimage,$im,0,0,0,0,$n_width,$n_height,$width,$height);
if (function_exists("imagepng")) {
Header("Content-type: image/png");
Imagepng($newimage,$tsrc);
}
elseif (function_exists("imagejpeg")) {
Header("Content-type: image/jpeg");
ImageJPEG($newimage,$tsrc);
}
chmod("$tsrc",0777);
}////////// end of png file thumb nail creation//////////
////////////// starting of JPG thumb nail creation//////////
if($_FILES['file']['type']=="image/jpeg"){
$im=ImageCreateFromJPEG($add);
$width=ImageSx($im); // Original picture width is stored
$height=ImageSy($im); // Original picture height is stored
$n_height=($n_width/$width) * $height; // Add this line to maintain aspect ratio
$newimage=imagecreatetruecolor($n_width,$n_height);
imageCopyResized($newimage,$im,0,0,0,0,$n_width,$n_height,$width,$height);
ImageJpeg($newimage,$tsrc);
//chmod("$tsrc",0777);
}
} else {
$sql1 = "SELECT * FROM tbl_board_directors WHERE fld_id =' ".$_GET['id']."' limit 1";
$result1 = mysql_query($sql1);
$test = mysql_fetch_array($result1);
$file = $test['fld_pic'];
$file = $file;
}
// End upload image direcotory
$sql = mysql_query("update tbl_board_directors set fld_sl_no = '".$dir_sl."', fld_name = '".$dir_name."', fld_post = '".$dir_position."', fld_email = '".$dir_email."', fld_mobile = '".$dir_mobile."', fld_details = '".$dir_details."', fld_pic = '".$file."' where fld_id = '".$id."' ");
if($sql){
//echo "<strong style='color:green; font-size:14px;'>Board of directors Updated!</strong>";
header("Location: board_directors.php?id=".$id."&edit=".$yes."&confirm=Content Updated!");
}
}