Please provide a bit more details
1) Is FSX:SE your only Flight Simulator - or do you have another Flight Simulator (P3D/FSX) that is updated?
2) What do you mean with "Demo did work"? Are you able to change voicespeed, set ICAO phrases, ???
3) What is this new callsign? Is it a callsign you have created yourself? A callsign you have imported, or a callsign that is already in EditVoicepack (if so, which one is it)?