Enrico Valsecchi wrote:
http://directory.fedora.redhat.com/wiki/FAQ#Troubleshooting_Admin_Server
    

O.K.,
I start with ./startconsole -a http://localhost:15555
When insert my username and Password, appear an error window,
with "Cannot connect to the Admin Server "http://localhost:15555/"
The url is not correct or the server is not running."
  
You're messing with the console. Your problem in with the admin server
(which the console tries to connect to, and obviously it can't).
Did you read the admin server troubleshooting page cited above yet ?