Perhaps a little more information.
Is there anything you can do when in TW2?
Have you set up your user profiles?
Have you reserved the elements?
Users can reserve and release elements as they work. A much easier and faster work-flow, but you still must have your user profile set up to let you work with the elements you want.
HTH
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"