upload erro

Gente to com dificuldade na pagina de upload pode me dizer oque ta errado sou leigo ainda :(

<?php

require_once '../database/mysql.php';
require_once '../class/Session.class.php';
require_once '../class/Upload.class.php';
$db = new Mysql;
$sid = new Session;
$sid->start();

if ( !$sid->check() ) {

 //@header( 'Location: login.php' );
}

$file_dst_name = "";
$album_id = $_GET['album_id'];

$dir_dest = '../fotos';

$files = array( );
$file = $_FILES['Filedata'];

 $handle = new Upload( $file );
 if ( $handle->uploaded )
 {
 $handle->file_overwrite = true;
 $handle->image_convert = 'jpg';
 //Configuracoes de redimensionamento retrato
 $lMax = 2000; //largura maxima permitida
 $aMax = 1600; // altura maxima permitida
 //Configuracoes de redimensionamento paisagem
 $plMax = 1800; //largura maxima permitida
 $paMax = 1400; // altura maxima permitida

 if ( $handle->image_src_x > $handle->image_y )
 {
 if ( $handle->image_src_x > $lMax || $handle->image_y > $aMax )
 {
 $handle->image_resize = true;
 $handle->image_ratio = true;
 $handle->image_x = ($lMax / 2);
 $handle->image_y = ($aMax / 2);
 }
 }
 else
 {
 if ( $handle->image_src_x > $plMax || $handle->image_y > $paMax )
 {
 $handle->image_resize = true;
 $handle->image_ratio = true;
 $handle->image_x = ($plMax / 2);
 $handle->image_y = ($paMax / 2);
 }
 }

 $handle->file_new_name_body = md5( uniqid( $file['name'] ) );
 $handle->Process( $dir_dest );
 if ( $handle->processed )
 {
 $file_dst_name = $handle->file_dst_name;
 $foto_data = date( 'Y-m-d 00:00:00' );
 $db->query( "insert into fotos (foto_album,foto_url,foto_data,foto_pos) values ($album_id,'$file_dst_name','$foto_data','999');" );
 //$file_dst_name .= "?v=" . time();
 $last_id = mysql_insert_id();
 echo json_encode( array( 'url' => "$file_dst_name", 'id' => $last_id, 'time' => time() ) );
 }
 else
 {
 echo json_encode( array( 'url' => "error", 'id' => '', 'time' => time() ) );
 }
 }
?>

 ( ! ) Notice: Undefined index: album_id in C:\wamp\www\dream\admin\upload.php on line *15* Call Stack # Time Memory Function Location 1 0.0430 254040 {main}( ) ..\upload.php**:**0  

 ( ! ) Notice: Undefined index: Filedata in C:\wamp\www\dream\admin\upload.php on line *20* Call Stack # Time Memory Function Location 1 0.0430 254040 {main}( ) ..\upload.php**:**0  

oque devo fazer