[jQuery] Problems with Multiple File Upload

[jQuery] Problems with Multiple File Upload


I am having a slight problem with the multiple file upload plugin,
found here:
http://www.fyneworks.com/jquery/multiple-file-upload/#tab-Support
Here is my HTML form:
<form id="uploadForm" enctype="multipart/form-data"
action="upload.php" method="POST" class="edit">
<fieldset>
<legend>Your file</legend>
<ol>
<li>
<label for="choosefile">Choose an image to
upload:</label>
    <input type="file" class="multi"
name="images[]">
</li>
</ol>
</fieldset>
    <input type="submit" name="submit" value="Send" />
</form>
And here is upload.php:
<?
session_start();
$files = $_POST["images"];
print_r($files);
?>
As you can see I am just trying to test out the processing of the
files, but I get an error on line 3:
Notice: Undefined index: images in c:\Inetpub\wwwroot\356\dackerma
\Project2\upload.php
Why am I getting this error? I named the input field correctly, and
included all of the files.