Hjælp til fil upload!

Jeg er ved at lave et script til at uploade filer med, men jeg får følgende fejl:

Warning: move_uploaded_file(/customers/xxxxxxx/xxxxxxx/httpd.www/): failed to open stream: Is a directory in /customers/xxxxxxx/xxxxxxx/httpd.www/tilfoj.php on line 18

Warning: move_uploaded_file(): Unable to move '/tmp/php6CtmoX' to '/customers/xxxxxxx/xxxxxxx/httpd.www/' in /customers/xxxxxxx/xxxxxxx/httpd.www/tilfoj.php on line 18

min php fil:

<?
move_uploaded_file($HTTP_POST_FILES['file']['tmp_name'], $_SERVER["DOCUMENT_ROOT"].'/');
?>

Jeg bruger b-one...
Kan i hjælpe??