[Savannah-hackers] Request for subsystem 'sftp' failed on channel 0

[regis]

I have the following error when i try to connect to my file area with sftp:

Connecting to savannah.nongnu.org...
Enter passphrase for key '/home/regis/.ssh/id_rsa': 
Request for subsystem 'sftp' failed on channel 0
Couldn't read packet: Connection reset by peer
bash-2.05b$ 

CVS (admin) acces work perfectly... dont know why only sftp doesnt work, 
anybody can help me?

Thanks
Regis