AuthenticationFailed in Capistrano

Hello friends!

I am getting following error while using $ cap deplot:setup * executing `deploy:setup'   * executing "mkdir -p ~/public_html/simak-in ~/public_html/simak-in/releases ~/public_html/simak-in/shared ~/public_html/simak-in/shared/system ~/public_html/simak-in/shared/log ~/public_html/simak-in/shared/pids"     servers: ["simak-in"] connection failed for: simak-in (Net::SSH::AuthenticationFailed: mandy)

Please help me to solve this error?