Due to the way the Dolby network connection has been designed, it can be tricky to get to work...
We would strongly recommend using a simple network switch, and NOT using a direct cable connection. Most modern PCs and laptops have auto sensing ports that don't work correctly with a direct point to point cable connections.
Although setting the Dolby to dhcp makes the monitor receive an assigned address, we have had issues getting it to act as a dhcp server.
We would suggest manually setting the monitor IP address to 192.168.1.101, subnet mask 255.255.255.0, setting the PC to 192.168.1.102, subnet mask 255.255.255. Then using a simple network switch, with just 2 cables, connect the monitor and LightSpace PC. Once set up, confirm the connection via a 'ping', and then try the LightSpace connection.
If a connection can be made, and the LightSpace CMS patch generation works (remembering the required 'Extra Delay Time' for the slow response of the internal Dolby Monitor Patch Generator), but LUTs or a Null Cube cannot be uploaded, it is possible the monitor has 'Locked Permissions'. Such permissions will need to be managed for LightSpace to work correctly. Please contact Dolby if you are unsure how to unlock permissions.