Kevsices

Hi I have a Swann Security System NVR8-7285 which came with 4 x NHD-810 cameras. I have started to install but have 2 x Hikvision cameras Model DS-2CD2032-1 which I woud also like to use on this system that are powering up but not displaying anything can any one tell me if these are compatible if so how can I get them recognised. many Thanks