When Trying to Access member profiles i get an error saying..

The requested URL /Kraze was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Also when I attempt to open blogs/videos/photos/music/classifieds/events/articles..

Im not sure what the problem is here... I've run the installation two times and still recieve the same errors.. How do I correct this?