Hikvision DS-7612NI-E2 NVR with Dahua cameras

Hi all

I have the Hikvision DS-7612NI-E2 NVR and a couple of the Dahua 4831-EMP-ASE cameras, i am trying to use the motion detection setting on the camera and have it record on the Hikvision NVR, the detection works on the camera but the NVR is not recording anything. If the NVR was set to record continuously it does without any issues.