title: Unable to connect with plink with public/private key's
body: <p>I am able to connect with Putty with my public/private key without being prompted for the passphrase (or password). I have pageant running in the background.</p>
  
  <p>However, trying to connect with plink won't work (form the same windows machine) :(... It is telling me that the key is refused by the server :(.. See the output below.</p>
  
  <p>Any idea why?</p>
  
  <pre>
  C:\Windows\System32>plink -v -agent -i C:\Users\ed\.ssh\id_rsa.pkk ed@bla.nl
  Looking up host "bla.nl"
  Connecting to 82.94.165.254 port 22
  Server version: SSH-2.0-OpenSSH_4.3
  Using SSH protocol version 2
  We claim version: SSH-2.0-PuTTY_Release_0.62
  Doing Diffie-Hellman group exchange
  Doing Diffie-Hellman key exchange with hash SHA-1
  Host key fingerprint is:
  ssh-rsa 2048 83:15:11:84:8f:d8:f9:3a:16:b0:e4:8d:ef:4c:18:c4
  Initialised AES-256 SDCTR client->server encryption
  Initialised HMAC-SHA1 client->server MAC algorithm
  Initialised AES-256 SDCTR server->client encryption
  Initialised HMAC-SHA1 server->client MAC algorithm
  Reading private key file "C:\Users\ed\.ssh\id_rsa.pkk"
  Unable to use this key file (unable to open file)
  Unable to use key file "C:\Users\ed\.ssh\id_rsa.pkk" (unable to open file)
  Pageant is running. Requesting keys.
  Pageant has 1 SSH-2 keys
  Using username "ed".
  Trying Pageant key #0
  Server refused our key
  Using SSPI from SECUR32.DLL
  Attempting GSSAPI authentication
  GSSAPI authentication request refused
  ed@bla.nl's password:
  </pre>