Comments allowed but not showing

Hi
Im using Twenty Eleven theme
Trying to enable comments in my posts but visitors still unable to comment.

When visitor try to comment, it says: It seems we can’t find what you’re looking for. Perhaps searching, or one of the links below, can help.

Already tried: Dashboard>All posts>Comments Allow
Also tried: “allow comment” in the discussion tab of each edit page
even tried: leaving a 1st comment myself from the edit page but still, comments are not showing

my blog is: betterme.info In case u wanna check what i mean

Thanks for your help