I hope the software is doing more authentication then just using the following html form variables or you may eventually run into some problems:
(from the reply page)

<input type="hidden" name="postername" value="Billy" />
<input type="hidden" name="IP" value="130.89.1.19" />
<input type="hidden" name="convert" value="markup" />
<input type="hidden" name="Sticky" value="" />
<input type="hidden" name="announcement" value="" />