Mért nem tudja átmásolni a képet (php)?

A hibaüzenet: Warning: copy(includes/avatar/1371067586.jpg) [function.copy]: failed to open stream: Permission denied in ********/includes/functions/avatar.php on line 63

A kód:

<?php

define ("MAX_SIZE","10024");

function getExtension($str) {

$i = strrpos($str,".");

if (!$i) { return ""; }

$l = strlen($str) - $i;

$ext = substr($str,$i+1,$l);

return $ext;

}

if(isset($_POST['Submit']))

{

$image=$_FILES['image']['name'];

if ($image)

{

$filename = stripslashes($_FILES['image']['name']);

$extension = getExtension($filename);

$extension = strtolower($extension);

if (($extension != "jpg") && ($extension != "jpeg") && ($extension !=

"png") && ($extension != "gif"))

{

echo '<h1>Unknown extension!</h1>';

$errors=1;

}

else

{

$size=filesize($_FILES['image']['tmp_name']);

if ($size > MAX_SIZE*1024)

{

echo '<h1>You have exceeded the size limit!</h1>';

$errors=1;

}

$image_name=time().'.'.$extension;

$newname="includes/avatar/".$image_name;

$copied = copy($_FILES['image']['tmp_name'], $newname);

if (!$copied)

{

echo '<h1>Copy unsuccessfull!</h1>';

$errors=1;

}}}}

if(isset($_POST['Submit']) && !$errors)

{

$sql = "UPDATE `b1_users` SET `avatar` = "".$newname."" WHERE `username` = "".$_SESSION['user'].""";

$res = mysql_query($sql);

echo "<h1>File Uploaded Successfully!</h1>";

}

?>

<form name="newad" method="post" enctype="multipart/form-data"

action="">

<table>

<tr><td><input type="file" name="image"></td></tr>

<tr><td><input name="Submit" type="submit" value="Upload image">

</td></tr>

</table>

</form>