Form Submit without Refreshing using Plugin (malsup) - php

Question

I just created a form submit without refreshing using this plugin : http://malsup.github.com/jquery.form.js
The simple example can be seen at
http://jquery.malsup.com/form/
I don't what I was doing, it was worked fine before until I modified something that I don't remember.
When I click SAVE, it should be processed on the background and it should stay on the same page. But now, it doesn't and it redirect me to the action page (process-001.php)
I created another page using the same method, and it works just fine.
Can you see if I'm doing it wrong?
Here is the form :
<div id="submit-form">
<form action="web-block/forms/process-001.php" id="select-block" class="general-form" method="post" enctype="multipart/form-data">
<div class="input-wrap">
<input class="clearme" name="Headline" value="<?php echo $Headline;?>" id="headline"/>
</div>
<div class="input-wrap">
<textarea class="clearme" name="Sub-Headline" id="subheadline"><?php echo $SubHeadline ;?></textarea>
</div>
<label>Bottom Left Image</label>
<div class="up-mask">
<span class="file-wrapper">
<input type="file" name="Pics" class="photo" id="pics" />
<span class="button">
<span class="default-txt">Upload Photo</span>
</span>
</span>
</div><!-- .up-mask -->
<input type="hidden" name="Key" id="Key" value="<?php echo $Key;?>"/>
<input type="submit" class="submit-btn" value="SAVE" />
<span class="save-notice">Your changed has been saved!</span>
</form>
</div>
The Javascript :
<script>
// wait for the DOM to be loaded
$(document).ready(function() {
// bind 'myForm' and provide a simple callback function
$('#select-block').ajaxForm(function() {
alert("Thank you for your comment!");
});
});
</script>