I am trying to set one of my CO lines on an LCOT16 card for DID mode on my KX-TDE100. When I go into DIL Table & Port Settings and try to change the Distribution Method to DID, I get "E000501 Invalid parameter (combination error)". I've tried looking around to figure out what is preventing me from changing the line to DID, but I don't know why. Can someone please tell me how to set up DID on this system? Thanks!