I have IPO 500V2 R 8.0.44; Advanced Charger + 3725 Handsets (v. 3.2.23). I have edited the parameters for the 3725 (system ->system A -> numbers -> voice mail) and entered *17. The handset shows synchronized and the entry is now light blue, but the voice mail key (hold down 1) or pressing the new message notification soft keys still say "voice mail number not defined". What am I doing wrong? I can't find any other promising fields to update, but maybe I am missing one?