Unable to access CVS server

[Parag N(पराग़)]

Hi,
 Today i got Sponsership from Kevin. I then tried to follow
http://www.fedoraproject.org/wiki/Extras/Contributors. But at step
Configure Your System for Fedora Extras CVS i am getting following
errors
[parag at localhost extras]$ cvs -t co common
 -> main loop with CVSROOT=:ext:paragn at cvs.fedora.redhat.com:/cvs/extras
 -> safe_location( where=(null) )
 -> Starting server: ssh -l paragn cvs.fedora.redhat.com cvs server
For more information on using the Fedora source code repositories,
please visit http://fedoraproject.org/wiki/UsingCvs
Permission denied (publickey,keyboard-interactive).
cvs [checkout aborted]: end of file from server (consult above messages if any)
 -> Lock_Cleanup()

May i know what am i missing?
Regards,
Parag.