Hikvision DS-2CD2035-I motion detection doesn't work, where to find firmware

[therealdeal74]

I'm having problems with motion detection on my DS-2CD2035-I camera. I'm using it with a Hikvision NVR, I tried setting it from the NVR and also on the camera itself and it just doesn't work. I have over 20 cameras not a problem like this one.

So I tried searching for a newer firmware I'm on 5.4 160401 but I can't find any firmware for this camera. I found something for 2xx5 cameras but it doesn't work.

Any advice is greatly appreciated. TIA