Sorry, but you can't use a version of DT Register that is over a YEAR old combined with the very latest Joomla series and expect everything to just work. Nothing works that way with Joomla.
Update DT Register to the latest build and you'll be fine. Thanks.
Nathan is no longer affiliated with DTH since the recent acquisition. You can connect with him and get any type of Joomla website help at
www.JoomlaEmployee.com
.