You need to enable Private Messaging. This is in the "Edit Options" of the control panel. If this isn't there, it has to be added somehow. You can try posting in
https://www.mobileread.com/forums/sh...d.php?t=319819 to ask it to be enabled, or contact a moderator.
And it helps if there is a single thread for requests for each device. The thread for the Touch 2 is
https://www.mobileread.com/forums/sh...d.php?t=287604.