I have an older meridian 2 VM System. I have install 2 DVC 2-port cards. The first card both ports work. Second card only first port works. I have 2 lines (275, 276) connected into ports 1 and 2 on DVC Card 1. They work fine. I want to add another line for DVC Card 2 port 1, so i can have 6 VM channels. When i unplug one of the lines from DVC 1 and plug it into DVC 2 it works fine and sees the lines and the port. However when I connect another phone line and DN (272) to DVC 2 port 1 it doesnt see it, and if i leave it in ther it crashes my phone system. I have to reboot the VM and unplug the line. However i can plug a phone into the line and it works ok. Is there settings i have to change to make that DN(272) work with the VM? Does the VM DN's have to be consecutive? Any help would be greatly appreciated.