The Vernier-branded Rotary Motion Sensor (RMV-BTD) can not ID on in Logger Pro when used with a LabPro interface because the LabPro firmware was created before this sensor. At this time there is no plan to update the LabPro firmware.
There are workarounds:
1. Manually set up the sensor
2. Open one of the experiment files from the Probes & Sensors / Rotary Motion folder.
3. Use a LabQuest interface.