TOPIC: DT Register hangs when in Event Mgmt Tab

Just loaded DT Register Friday. All of the other tabs worked just fine with regards to data entry and saving info. However, when I try to create an event, the drop down menus are incredibly slow, the text input boxes are slow as well. Eventually, the page hangs and stops responding.

Help! Need to set up an event ASAP.

I have version 2.7.3.a if that matters. (It probably does)