I have two IP 406 with v4.0.10 on both. I am trying to use centralized Voice Mail (VM PRO). I have installed Advanced Networking on both systems and it is working. (Site A) has VM PRO and it works OK, but (site B) VM will only work for two hours. After two hours you hear dead air when you call VM PRO from (site B). If I restart (site A) server with VM Pro (site B) will start working for another two hours. Can any one help? Thanks for any help!