Hi again,
I installed the driver. I only got a warning "You may need to install module-init-tools", however module-init-tools was already installed. When I ran modprobe 4fm i got an error "FATAL: Module 4fm not connected".
For your reference, I have the VP780 with an FMC126 module and all of the CPLD LEDs are off at power on.
Also the udev.rules file does not exsist in the etc/udev/rules.d folder.
Regards,
David