I have chosen a number of forums and threads to follow, but I'm not getting email notification of new content in them. I have double-checked that the email listed for me is correct. I have gone to the bottom of the list of forums (or threads) I've selected to follow, checked "select all" and then chosen the option to get email notification, but these check marks disappear after I click on the "take"(?) button. What am I doing wrong? Thanks!