[ubuntu] During SSH password won't unlock private key

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http://ubuntuforums.org – I'm using Ubuntu 13.04. I'm trying to push something with git over an SSH connection. But, out of nowhere, I get a message that asks me to "Enter password to unlock private key." It asks for the password for my username on the ubuntu login. But it will not unlock, even when I give it the correct password. It won't accept blank either. So it is impossible for me to send my data through SSH. What the heck? (Hardware)