up file, pomocy Opcje

[Rob.Bed]

Kod

function up_file() {

global $id, $obraz, $size, $date, $nick, $opened, $mapamiasta_tbl, $PHP_SELF, $acc, $access, $op, $goto;
if(have_access($op)=='ok') {

move_uploaded_file($obraz, $url.$plik_name);
chmod($url.$plik_name, 0777);

if($goto=='')
header("Location: admin.php?op=$op");
else
header("Location: $goto");
exit;
}
}

I pokazuje mi blad :

Warning: move_uploaded_file(): Unable to move 'C:\DOCUME~1\Rob.Bed\USTAWI~1\Temp\php37.tmp' to '' in c:\usr\krasnal\www\jportal\admin\mapamiasta.adm.php on line 125

Warning: Cannot modify header information - headers already sent by (output started at c:\usr\krasnal\www\jportal\admin\mapamiasta.adm.php:125) in c:\usr\krasnal\www\jportal\admin\mapamiasta.adm.php on line 129

Linia 125 move_uploaded_file($obraz, $url.$plik_name);
Linia 129 header("Location: admin.php?op=$op");