Early days if testing but I have finally got it working. Basicly dont set the min/max! I cleared everything and started over. All I did was enable intrusion, drew the detection area. Turned off human and vehicle. Set the threshold to 0 and sensitivity to 80. I then saved it. Moved over to linkage, turned on full screen monitor, buzzer and notifications. Clicked apply and saved it. Then tested. Now its working. So now I will tweek it until im happy.
As an update, I have now turned on human and vehicle and that also works. So I will monitor this. Clearly something not quite right with the min max side of things. I have copied all the guides identical, so I would hazard a guess it might be firmware issues eith either the recorder or the camera. At the moment its pointing at the camera.