have 3 "HWT B120 M" cameras but only one alows to set line-crossing event

Hi,


I have 3 "HWT B120 M" cameras and a "HWD-5104M" DVR
I can only set line-crossing on one camera, when i try to set on the others two its says it is not suported by the camera.

What could be the problem?
Any help is wellcome.
Thanks
Luis.