I am using version 7.0.7. Unfortunately I cannot share the presentation at this time.
I could not reproduce it on Presenter 7.0.7
Could you verify one thing:
Goto MAnage Quiz->select the question and press Edit.
Select Options tab.
Verify that the options 'Show correct message', 'Show error message' are checked.
If not, please check them.
If this do not resolve the problem, then I need to know all other setting syou made inside the Manage Quiz.