Kathy,
Welcome to the forum!
Can you elaborate on what "does not work at night" means? eg:
- No live view?
- No recorded video?
- No IR illumination? Do they glow red?
- Is there enough other light, so the cam could get an image without relying on IR?
- Is the camera set to automatically switch from color (Day) to b&w (night)
Check the recording schedule. Is the system set up for 24/7 recording?
Workaround: Every night, change the system's clock by 12 hours. The system will think it's daytime!
Fastb