Hi, I have the following problem:

A user a private post, the moderator can see and reply; So far so ok.

The makeshift is that, after answering the moderator, the user who wrote the post can not return to meet again

Namely that the author of the post can only write the private post, but once you respond can not respond to the moderator.

Error: "Sorry, but you are not authorized to answer in this conversation"

I have checked the permissions and everything is ok.