Due to the number of people that have had this same question, here is a sticky post about it
If you have created events in the JEvents component, but go into DT Register and do NOT find the new events there, read this.
First, be aware that on the Event Management page of DT Register, it will list events already setup in DT Register. The dropdown that shows there is a FILTER and does NOT show events from JEvents. To setup a new event for registration, click the NEW button in the top right corner. On THAT screen is the dropdown that pulls the events from JEvents. Now, if you are in the right place and still not seeing events, it would be because of one of the following reasons:
1) The event is already past. Make sure the event date is after today. DT Register will not pull in events that are already too late to register for
2) The event is a recurring event. DT Register will only recognize one-time events. It can be a multi-day event, but can not be a repeating item like every Tuesday, once per month, etc.
3) The event has already been setup in DT Register.
4) If using JEvents 1.5alpha2, you must use the legacy events and NOT the iCal events. DT Register will not see iCal events until the 1.5 native release.
Hope this helps some people!