Security Monitor Pro does not support multi-port capture cards. Only the first port is detected, so only one camera will be recognized. To use multiple CCTV cameras with Security Monitor Pro, we recommend using a multi-port video encoder such as the Axis 241Q (https://www.axis.com/products/cam_241q/). This device is fully supported in our software. Using this device, you can add 4 cameras to Security Monitor Pro.