Check the path to your button in ajax.html
find this code:
Code:
background:url(http://www.xxxxxyyyyyzzzz.com/forum/content/images/button.png) no-repeat 0px 0px; }a.button:hover { color:#333333; background:url(http://www.xxxxxyyyyyzzzz.com/forum/content/images/button.png)
Check the path is correct

If you are running the VB Syuite, I suggest renaming the content folder to content2 ( in this download package for this hack ) then upload via ftp. Or if you have already uploaded, just rename it via ftp to content2
Then in the code from ajax.html
change content to content2
And also in the footer code in the readme, change:
<p><a class='registerModal' href="content/ajax.html" title="Register for Free">Register</a></p>
to
<p><a class='registerModal' href="content2/ajax.html" title="Register for Free">Register</a></p>
STe