UTM HotSpots - Hotspot Customization

I want to create a customize Login Website.

I put this code in my index.html.

<form action="?action=login" method="POST" onsubmit="return false;">
<table>
<tbody>
<tr>
<td>Password of the day:</td>
<td><input type="text" name="token" value="" size="20"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" name="login" value="Login"></td>
</tr>
</tbody>
</table>
<input type="hidden" name="location" value="">
</form>

I upload this and choose "full", the index is showing, if I am login with a guest network, but it happen nothing.
Did I use wrong keywords in html? is anything missing? Any javascript or something?
there is no template for this, only for after login. 

And i put also a png file with
  <img class="site-logo-img" src="logo.png" height="20%" width="20%">
(on my mac, it works, but if i try it with "preview", it doesnt work)

Thanks guys