Thanks for contacting us and we're sorry to hear about this issue.
Are you trying to comment while signed in to TypePad or by just filling in the commenting form? If you try one option and then the other, do you have the same problem commenting or does it work better then?
You need to have the entire form filled in when commenting and then manually type into the comment box to active the buttons. If you're copying and pasting content in, for example, then the buttons won't work.
What web browser are you using? If you use a different one, does it work then?