ERROR: The page cannot be displayed. - HTTP 500 - Internal server error
To isolate the issue, you need to start this process from a clean install.
1). Make sure you friendly errors disabled in your browser
2). Set the directory permissions as defined here: http://dmxready.helpserve.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=170
3). If you still get ERROR 500, remember you need to set up error reporting on your server, to identify the actual error message so you can find the correct solution. See here: