My document not saved on same server

Hi.. am trying to save update d file on same server but it can't be. am very worried please give me solution.
also it gives message -Document Saved Successfully
here's my code--
form.php :-
<form method="POST" action="https://exportwriter.zoho.com/remotedoc.im" enctype="multipart/form-data" target="_self"
accept-charset="UTF-8">
<input type="hidden" name="url" value="http://64.251.22.148/p585/WBS_P585.docx">
<input type="hidden" name="apikey" value="cec91fb9cc3a4b62fc96ba785bb734e3">
<input type="hidden" name="output" value="url">
<input type="hidden" name="mode" value="normaledit">
<input type="hidden" name="filename" value="WBS_P585.docx">
<input type="hidden" name="lang" value="en">
<input type="hidden" name="id" value="12345678">
<input type="hidden" name="format" value="docx">
<input type="hidden" name="saveurl" value="http://64.251.22.148/p585/save.php">
<input type="submit" name="submit" value="Open/Edit">
</form>
save.php:-
<?php
    $filepath = 'http://64.251.22.148/p585/WBS_P585.docx';
    $tmp_filename = $_FILES['content']['tmp_name'];
    $upload_status = move_uploaded_file($tmp_filename, $filepath);
?>

thanks in advance,
Sachin

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