I need a little help. I have searched through the help documents but can't find an entry related to message issues. I can send a message to my students with no trouble. I can send to one or many etc and I can confirm that those messages arrive. Yet when a student replies to the message I have sent, I receive nothing. Is there a setting somewhere I've missed or is it an error? I use a free teacher's account (I don't have enough students yet to justify paying). Any ideas?