Good morning. I was wondering if someone will be able to give me some advice. I have a hikvision DS-7716NI-SP/16 system with 13 active zones that came with my new home. The cameras are 2mp each. I recently had to zoom in on a recording and realized it was very pixelated so I wanted to upgrade the cameras. I bought one that hikvision said was conpatible with my system. It is a DS-2CD2155FWD 5mp. I plugged it directly into the back of my DVR as zone 14 and it works but the resolution max is out at 640-480. there are no options in the drop down to go anyway near the resolution of my other cameras (2048 x 1536). Is there a step I'm supposed to do to get this resolution. I bought it from Amazon and some people commented about them being knock offs. Any advice? Thank you in advance