Why does LabTutor fail to detect a connected PowerLab, while LabChart can detect it fine?

If LabTutor is failing to detect a connected PowerLab it is likely that the LabTutor Kernel has been set to start in Analysis Mode. To enable scanning for PowerLabs do the following:

1) Open LabAuthor and create a new experiment 
2) Go to the LabTutor Kernel and select 'Edit' -> 'Preferences' -> 'PowerLab Startup' 
3) Select to look for PowerLabs on USB 
4) Close LabAuthor

The next time the LabTutor Kernel launches it should detect any connected USB PowerLabs.