Some people have had difficulty installing iPeer, including myself. As previously posted, iPeer requires CakePHP, an open source web application framework for producing web applications. Unless it is installed on the server hosting iPeer, iPeer will not run. The way to rectify that is to download CakePHP (it's free) at http://cakephp.org/ and install it on the server where you have installed iPeer. My university does not have CakePHP installed but gave me some server space to install it myself. You can also install CakePHP on any other server where you may rent space, such as Lunar Pages.