cat .ssh/id*.pub > .ssh/authorized_keys

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2013.08.22 09:39:08    =~=~=~=~=~=~=~=~=~=~=~=
login as: new_user
Server refused our key

$ su - user2  (or whatever you named it to)
Password:     (enter the password)