nvr ds-7104n-sn

Hello everyone I'm working on building a new set of PoE camera system, I have DS-2CD2145FWD x 3 , and also have the DS-7108N-SN/P. I can use the application iVMS-4200 to connect each camera without any issue. but the NVR doesn't seem to recongnize any of those cameras. what did I do wrong...

Hello. whether there is an firmware for Hikvision NVR DS-7104N-SN