use with Hercules Mk4

Sirs
I have just changed my computer and am trying to run Cross DJ 2.4.0
Unfortunately although it appears to recognise my Hercules Mk4 it does not accept any controls. I have tried reloading/ starting Cross DJ with Hercules attached and also starting computer with it attached. No response
What could I be doing wrong please
Robiona
I have just changed my computer and am trying to run Cross DJ 2.4.0
Unfortunately although it appears to recognise my Hercules Mk4 it does not accept any controls. I have tried reloading/ starting Cross DJ with Hercules attached and also starting computer with it attached. No response
What could I be doing wrong please
Robiona