Switching to Scarlett 3rd Gen records no audio in previous recordings


I am using Cubase LE9 that came with my Focusrite Scarlett 2i2 2nd Gen Studio Bundle. Now I have a Scarlett 2i2 3rd Gen but I can’t get it to record audio in recordings originally made using the 2nd Gen Scarlett. The microphone and Scarlett are registering the audio input, but the recording wave in Cubase is just a flat line.

I updated the driver from Focusrite.

The 3rd gen seems to work fine in new projects when all the VST Connections and control panel are set up correctly with the Scarlett

Any clues?

Many thanks for your help