Trying to install a "Raw" copy of Icy Phoenix to your own PC/localhost aka 127.0.0.1 can and will at times produce the following error. It may not be the same error - But errors nevertheless depending on what you are using as your Local Server.
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.
If you think this is a server error, please contact the webmaster.
Remedy: Rename or Delete the .htaccess file in the root of the Icy Phoenix forum, as it was not written to work with 127.0.0.1.
Note: If in the future you want to upload the forum from 127.0.0.1 to a Web-Server, you will have to make good the changes you made with the .htaccess file. Also note that Windows may not allow you to change the file name back to .htaccess, in this case you will have to re-name it at the Web-Server.