Show sidebar in single question page

Good morning,
I kindly ask for support to show the sidebar in the single question page. Unfortunately the first help was not correct, so I ask you if you can help me to find the right code.
This is the single question page: http://www.galileiani.it/question/domanda-di-prova/
This is the suggested (wrong) code:
add_action('qa_action_before_single_question', 'qa_action_before_single_question', 10);
add_action('qa_action_after_single_question', 'qa_action_after_single_question', 10);

function qa_action_after_single_question() {
echo '';
}
(I'd prefer the right sidebar, not in the left, if possible)

Thank you in advance
Melania