DarkRP server damage all kinds of messed up

Ok so here goes, I own a darkRP server. I used to host it but i reinstalled everything fresh and all was working well and then I get on one day and fall damage just does not work at all
I am use a drowning mod and fire fighter mod that I have removed to see if it fixes it and it does not also these worked on the old server just fine. The weird thing is this.
I also have vehicle damage MOD and the fire from that kills you along with PVP works perfect. But drowning from the drowning MOD the fire from my firefighter job and also the fall damage for some odd reason does not work, Could you guys please help me on how to get this to work again!