un know action

hi all,

          in my controller im having index method and some other
methods.my controller's name is "ticketing_system".but in browser when i
point out the controller's name "http://localhost:3000/ticketing_system"
im getting error

Unknown action

No action responded to monitored

   im new to ror.people know the reason please help me.

try to trace your error or see /log/development.log