backlog can not edit sprints it say could't find Issue with ID=edit

[jinyifeng]

when i choose Backlog after add new sprint,it can not edit sprint ,it says that :

Processing SprintsController#show (for 127.0.0.1 at 2011-01-19 16:43:06) [GET]
Parameters: {"task_id"=>"edit", "project_id"=>"first", "action"=>"show", "id"=>"1", "controller"=>"sprints"}

ActiveRecord::RecordNotFound (Couldn't find Issue with ID=edit):
vendor/plugins/redmine_sprints/app/controllers/sprints_controller.rb:287:in check_if_redirected' /usr/lib/ruby/1.8/webrick/httpserver.rb:104:inservice'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in run' /usr/lib/ruby/1.8/webrick/server.rb:173:instart_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in start' /usr/lib/ruby/1.8/webrick/server.rb:162:instart_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in start' /usr/lib/ruby/1.8/webrick/server.rb:92:ineach'
/usr/lib/ruby/1.8/webrick/server.rb:92:in start' /usr/lib/ruby/1.8/webrick/server.rb:23:instart'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'

Rendering rescues/layout (not_found)

is there anyone know what's wrong ?

[VinithaVarun]

Did anyone have a solution?