I've recently changed modem/router and when I tried putting in new IP address, it told me that connection failed. Is there something else I have to do?
There is a quick operations guide available for NVMS 7000. I recommend that you download it to see how the device will be configured.
You can download it in PDF format using the following link: http://www.apexcctv.com/support/Downloads/Standalones/AP-608VL/NVMS7000_QuickOperationGuide.pdf
In the guide you will see how to add and configure the IP address as well.