I have the following set-up and still unable to see the registered person...
Show Registrant Name: First Name Last Name Both
Show Registrant Username: No Yes
Show Date Registered: No Yes
Registrant List Access: Private Public
Everything else is No...
This post doesn't tell us much. Sounds like something that should be in a ticket, not here. Make sure you are using the latest version of DT Register. Then submit a ticket with more details and admin access so we can take a look.
We resolved this through a ticket, but for those at home... problem was due to settings. They had selected Community Builder for profile integration in the main config of DT Register... but did not have CB installed. So, the attendee's list was attempting to connect the user list to CB profiles, but couldn't. Turned off that setting and it's fine.