SSH problem with https://github.com/dresden-weekly/ansible-rails-example (wrong key?)

gistfile1.txt

thelonius@thelonius-VirtualBox:~/dresden-weekly/ansible-rails-example$ ./remote.sh
Using Ansible from /opt/ansible v1.8.2

Setting up Ansible to run out of checkout...

PATH=/opt/ansible/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PYTHONPATH=/opt/ansible/lib
MANPATH=/opt/ansible/docs/man:

Remember, you may wish to specify your host file with -i

Done!

Using Rolefile
Running Ansible
ansible-playbook  /home/thelonius/dresden-weekly/ansible-rails-example/ansible/plays/provision.yml --inventory-file=/home/thelonius/dresden-weekly/ansible-rails-example/ansible/hosts/itedd-vm

PLAY [app] ******************************************************************** 

GATHERING FACTS *************************************************************** 
fatal: [itedd-vm] => SSH encountered an unknown error during the connection. We recommend you re-run the command using -vvvv, which will enable SSH debugging output to help diagnose the issue

TASK: [dresden-weekly.Rails/postgresql | Configure Locales] ******************* 
FATAL: no hosts matched or all hosts have already failed -- aborting


PLAY RECAP ******************************************************************** 
           to retry, use: --limit @/home/thelonius/provision.retry

itedd-vm                   : ok=0    changed=0    unreachable=1    failed=0