Heroku authenticating proxy error

 !    Heroku client internal error.
 !    Search for help at: https://help.heroku.com
 !    Or report a bug at: https://github.com/heroku/heroku/issues/new

    Error:       A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. - connect(2) (Errno::ETIMEDOUT) (Excon::Errors::SocketError)
    Backtrace:   C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:41:in `connect'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:41:in `block (2 levels) in
connect'
                 C:/Program Files (x86)/ruby-1.9.2/lib/ruby/1.9.1/timeout.rb:58:in `timeout'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:40:in `block in connect'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:29:in `each'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:29:in `connect'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/ssl_socket.rb:77:in `connect'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/socket.rb:16:in `initialize'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/ssl_socket.rb:8:in `initialize'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/connection.rb:364:in `new'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/connection.rb:364:in `socket'
                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/connection.rb:192:in `request_kernel'

                 C:/Program Files (x86)/Heroku/vendor/gems/excon-0.16.10/lib/excon/connection.rb:103:in `request'
                 C:/Program Files (x86)/Heroku/vendor/gems/heroku-api-0.3.7/lib/heroku/api.rb:74:in `request'
                 C:/Program Files (x86)/Heroku/vendor/gems/heroku-api-0.3.7/lib/heroku/api/login.rb:9:in `post_login'
                 C:/Program Files (x86)/Heroku/lib/heroku/auth.rb:80:in `api_key'
                 C:/Program Files (x86)/Heroku/lib/heroku/auth.rb:189:in `ask_for_credentials'
                 C:/Program Files (x86)/Heroku/lib/heroku/auth.rb:221:in `ask_for_and_save_credentials'
                 C:/Program Files (x86)/Heroku/lib/heroku/auth.rb:84:in `get_credentials'
                 C:/Program Files (x86)/Heroku/lib/heroku/auth.rb:41:in `login'
                 C:/Program Files (x86)/Heroku/lib/heroku/command/auth.rb:31:in `login'
                 C:/Program Files (x86)/Heroku/lib/heroku/command.rb:206:in `run'
                 C:/Program Files (x86)/Heroku/lib/heroku/cli.rb:28:in `start'
                 C:/Program Files (x86)/Heroku/bin/heroku:24:in `<main>'

    Command:     heroku login
    Version:     heroku/toolbelt/2.33.3 (i386-mingw32) ruby/1.9.2