One thing to note is that if your browser user agent doesn't contain the words "amigaos", "morphos", "aros" etc., you'll get a HTTP 302 and be redirected to the main site as the proxy thinks you are using a CSS capable browser.
During testing, I found that all the default browser spoofs for IBrowse still included the real OS name, so I added this redirect to reduce load on my server caused by a bewildering number of (presumably anonymous) guests that were using the site with Windows/IE etc.
In short, you need to be using a proper amiga browser. If you are spoofing using a custom user agent string, just add "amigaos" to it and you shouldn't ever be redirected.