Ruby on Rails

Hi,
I'd like to create my first ROR application on Heroku but I can't deal
with one step in this tutorial:
http://devcenter.heroku.com/articles/quickstart
I've spent all my day for this and I have no idea what is wrong...

I cannot deal with last one in 3th part -> Create your Heroku
application

What I did:

I've installed eveything what I need

1.
switch to the ROOT and go to project directory:
/home/alex/Dokumenty/work/depot/
git init
git commit -m "new app"
1st step DONE

2.
http://help.github.com/linux-set-up-git/ - I use this
tutorial
$ ssh-keygen -t rsa -C "a.sadecki@gmail.com"
passphrases --> empty
I've copied id_rsa.pub into SSH Public Keys in GITHUBE site
$ ssh -T git@github.com
git config --global user.name "girly girl"
git config --global user.email "a.sadecki@gmail.com"
git config --global github.user girlygirl
git config --global github.token my_token
2nd step DONE

3.
I go to the /home/alex/Dokumenty/work/depot/ and write command :

heroku create --> with result:
Enter your Heroku credentials.
Email: a.sadecki@gmail.com
Password:
Creating electric-fog-9780... done, stack is bamboo-mri-1.9.2
http://electric-fog-9780.heroku.com/ |
git@heroku.com:electric-fog-9780.git
Git remote heroku added

Nextly:
git remote show heroku with result:

The authenticity of host 'heroku.com (50.19.85.132)' can't be
established.
RSA key fingerprint is xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'heroku.com,50.19.85.132' (RSA) to the list
of known hosts.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

Any ideas? Pls help me!

Thx in advance

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