New Thread image as a button

[rockon]

I'm having some trouble making a submit button work to create a new thread in the FORUMDISPLAY template.

Here's the code i'm using:

<td class="smallfont"><if condition="$show['newthreadlink']">
<form method="link" action="newthread.php?$session[sessionurl]do=newthread&amp;f=$foruminfo[forumid]" rel="nofollow">
<input type="submit" class="button" value="New Thread" />
</form>
<else />&nbsp;</if></td>

I'm not sure if the rel="nofollow" should be there but it doesnt work with or without it.

It just says "You did not select any valid threads" as you can see here:

http://www.rockonpublishing.co.uk/forumdisplay.php?f=5
(click the top new thread button)

Interestingly, I just noticed that from the button it links to this URL:

http://www.rockonpublishing.co.uk/in....php?forumid=5

but the original image at the bottom links to:

http://www.rockonpublishing.co.uk/ne...=newthread&f=5

which is what I want my button to do!

Any ideas?