Puttygen windows 7

After installing TortoiseGit I used its puttygen.exe to generate a key. This gave me something like

- BEGIN SSH2 PUBLIC KEY -
Comment: "test@example.com-20110212"
AAAAB3NzaC1yc2EAAAABJQAAAQEAguK4gT6H6J0dKtf5S8NA8FkYHagIoKipN21Y
z0Ut6VAdwlUkE83aX96lZajrijes/fKPNbttAulwONLdtRXJMlJmUrOji13hNHTm
XLHlfRoFZpvq1wI8Wbt8RwdgTC/D7MVPUzjWkYOwVS9ywoUUee29nyHZDxv8rKL1
abZnCXHrEZdR0uutw+y02bm1KDL+suGGp5ecttAKPiWtWseH1R+aZZFgo9xFjl9K
UFzeIHUEYSnUX32+mSoIdHs4vZvzOCmZV0Q8/OUUWAsF1kaeH2Krp+dUazDNsVdb
/hlQMviPd38EKR/AzaMKLGEhWtWn3Sgt2FL/N1X8oJYUrLxmkw==
- END SSH2 PUBLIC KEY -

but git-dev.drupal.org doesn't like it and tells me

The key is invalid. It must begin with ssh-rsa or ssh-dss.

Need help with public keys? View the excellent GitHub.com SSH public key help at .

So I click the link to a page that tells me

Attempting to redirect to the guide for your OS. If the redirect fails, pick your OS:

* Windows
* Mac
* Linux

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Puttygen for windows 7

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Puttygen id_rsa