Askbot login and answering issue

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Hi,

I am using askbot for the first time and have installed the latest version(0.7.49) as per the installation steps to one of my existing application. I am facing some issues while using the app.

1. When I try to login and when I give wrong username/password, it displays django 404 page instead of error message.

2. I can post a question and the author can answer his own question. But when a different user tries to answer the question error occurs DoesNotExist at /questions/1/answer/ Group matching query does not exist.

Thanks in advance