Почему SVN + SSH запрашивает пароль, несмотря на файл ключей SSH?

У меня есть ключи, настроенные так, что я могу войти в SVN_HOST следующим образом:

ssh <USER_NAME>@<SVN_HOST>

Запишет меня на SVN_HOST без запроса пароля. Все идет нормально; тем не мение:

svn update svn+ssh://<USER_NAME>@<SVN_HOST>/<PATH_TO_REPO> <DEST_PATH>

По-прежнему запрашивает:

<USER_NAME>@<SVN_HOST>'s password: 

Когда я ввожу пароль, он работает так, как я ожидал; однако я не понимаю, почему он настаивает на запросе пароля в случае svn + ssh.

Заранее спасибо.

РЕДАКТИРОВАТЬ: По запросу Verbose SSH выводится через:

SVN_SSH="ssh -v " svn update svn+ssh://<USER_NAME>@<SVN_HOST>/<PATH_TO_REPO> <DEST_PATH>

Результаты в:

OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to <SVN_HOST> [<SVN_HOST>] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.1p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA cd:32:17:49:fa:19:aa:64:57:91:76:0d:76:19:82:2f
debug1: Host '<SVN_HOST>' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: Next authentication method: password

Затем запросили пароль:

<USER_NAME>@<SVN_HOST>'s password: 

После ввода пароля:

debug1: Authentication succeeded (password).
Authenticated to <SVN_HOST> ([<SVN_HOST>]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LC_MESSAGES = en_CA.UTF-8
debug1: Sending env LC_COLLATE = en_CA.UTF-8
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending env LC_CTYPE = en_CA.UTF-8
debug1: Sending command: svnserve -t
At revision <REV_NUM>.

Key Gen делался так:

ssh-keygen

Затем, используя значения по умолчанию:

ssh-copy-id -i ~/.ssh/id_rsa.pub <USER_NAME>@<SVN_HOST>