ssh-keygen command not doing anything OR github problem

[mearrex]

In my cygwin installation, I cannot seem to use github.com. However, here are
the problems I am seeing.

When I type in: git remote add origin
git@github.com:<username>/first_app.git
I got no issue.

However, when I type in: git push origin master
I get an error: fatal: The remote end hung up unexpectedly

I have tried to do that using these instructions: 
http://help.github.com/msysgit-key-setup/
http://help.github.com/troubleshooting-ssh/

However, when I type in the commands
ssh
ssh-keygen
ssh-keygen -t rsa -C "XXXXXX@XXX.com"
ssh git@github.com
ssh -v git@github.com

nothing happens. It just returns a new line. I am attaching a screenshot. 
What am I doing wrong? What do I need to do to get this to work?
http://old.nabble.com/file/p30829947/screenshot.jpg 
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