Greg,
The lack of details makes it impossible for any of us to help you. At the very least, we need the TIU revision (on the back of the TIU (Rev I, Rev L, etc), the software version (on the remote, Menu-> System-> TIU setup-> TIU version) and how you are connecting the WIU to the TIU (USB or USB to serial adapter). If you are using a serial adapter, make and model.
Tony