cannot access ispconfig web interface

[spekkio]

So heres were i am, ive set up a functioning feisty fawn box according to this guide
http://howtoforge.org/perfect_setup_ubuntu704
and i then installed ispconfig according to this
http://www.ispconfig.org/manual_installation.htm
it all works fine, but i did this on my LAN and the ip the server got was 192.168.0.25. I then moved this server to another ip address, but it to had another router and i made sure it kept the same LAN ip of 192.168.0.25. I then went into ispconfig and under server settings changed the host and domain to www.example.com. Now for some reason i cant access the web interface of ispconfig outside of the LAN, i try https://www.example.com:81, and even the IP address and it still doesn't let me in. What it does end up doing is i get a error message saying. "www.example.com has sent an incorrect or unexpected message. error code -12263" but if i try changing the adress to http, instead of https, i get a directory listing "Index of /" so i know somethings there. Anyway any help would be appreciated on how i can access ispconfig from outside the LAN.