SSH: Unable to use key file (OpenSSH SSH-2 private key)

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http://rtfm.co.ua/wp-content/uploads/2013/07/ssh_logo.jpg SSH: Unable to use key file (OpenSSH SSH-2 private key)
При подключении к серверу с использованием RSA-ключа - Putty сообщает об ошибке:
Unable to use key file "C:\Users\User\Documents\Temp\APPGateKeeper" (OpenSSH SSH-2 private key)
Using username "app_env_1".
Using keyboard-interactive authentication.
Password:

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RSA, ssh #RSA, #Ssh