404 – NOT FOUND

Dear all,

I was able to install successfully
http://bacho.vietnamexpats.net/question/

But when click to view a topic then I got the 404 error message

Could you please help? Here is admin account
http://bacho.vietnamexpats.net/wp-admin
Username: admin
Pass: admin@07

Thanks very much
Nguyen

https://wordpress.org/plugins/dw-question-answer-embed-question/