i have the form, and i want to upload two files. here is the script

<form action="form.php" method="post" enctype="multipart/form-data" />
<input type="file" name="video"  />
<input type="file" name="picture" >
<input type="submit"  class="input" value="?????" />
<input type="hidden" name="MAX_FILE_SIZE" value="100000000" />
</form>

form.php:

<?
    print_r($_FILES);
    $video_name = $_FILES["video"]["name"];
    $image_name = $_FILES["picture"]["name"];
    echo "video",$video_name;
    echo "image",$image_name;
                              //returns Array ( ) videoimage
?>

when i try to upload the file greater than 10MB, it doesn't happen. i try in many browsers. maybe i must change some field in php.ini? but i haven't permission to change them on the server. so what can i do? thanks