I have been happily using 3CX 6.0. I just installed 9.0 on a new system and copied all the settings over from 6.0. Everything looks fine, but I can't get the phones (Grandstream Budge Tone 200) to register. When I go back to 6.0, everything works fine. It did kill 6.0 while testing 9.0. I am not using 10.0 because I can't get it to run (installs OK) on an XP box. Any suggestions?