Why do I get an IOError when attempting to add users? [closed]

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We set up 2 askbot forums, one locally, and one on an Amazon EC2 instance. On the Amazon EC2 askbot, I get this error any time I attempt to create a user:

IOError at /account/signup/

On the local one, we were originally able to make users, but when that server was shut down and moved, we lost that capability and now get the above error.

Why are we getting this? Is there something simple that I am missing?

I can tack on the longer traceback if that would be helpful...