i have installed dolpin and everything looks ok,i installed modules to.but now when i click a menu it shows me this

Not Found

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

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

Locked for duplicate: http://www.boonex.com/forums/topic/help-me-2014-11-02-0.htm

Please check the answers in that thread.