github报错Permission denied (publickey)，求帮助

错误代码如下：$ ssh -vT [email protected] -i zzmgithub_dsa
OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007
Warning: Identity file zzmgithub_dsa not accessible: No such file or directory.
debug1: Reading configuration data /c/WINDOWS/system32/config/systemprofile/.ssh
/config
debug1: Applying options for github.com
debug1: Connecting to github.com [207.97.227.239] port 22.
debug1: Connection established.
debug1: identity file /c/WINDOWS/system32/config/systemprofile/.ssh/zzmgithub_ds
a type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debia
n-6+squeeze1+github8
debug1: match: OpenSSH_5.5p1 Debian-6+squeeze1+github8 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc 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: Host 'github.com' is known and matches the RSA host key.
debug1: Found key in /c/WINDOWS/system32/config/systemprofile/.ssh/known_hosts:1debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: C:\\Documents and Settings\\Administrator\\.ssh\\id
_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /c/WINDOWS/system32/config/systemprofile/.ssh/zzmgit
hub_dsa
debug1: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>
Enter passphrase for key '/c/WINDOWS/system32/config/systemprofile/.ssh/zzmgithu
b_dsa':
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
passphrase 是正确的，这个没有问题，不知道哪里出问题了。