Airspeed reading stuck at zero

Hi, I’m having some problems getting the airspeed sensor on my next build working. The sensor is an DLVR-I2C and the FC is a matek F765 WSE. The airspeed is stuck at zero and when doing the pre flight calibration the Airspeed 1 unhealthy message appears. I’ve sett the airspeed type to 9 as described in the ArduPilot mapping for the FC. Pls help:-)