I am having a problem with the serial intergration on a Comdial 16/32 dsu w/20A software. As you know when you log onto voicemail the display of the phone shows you the "Welcome to VVP" and shows how many messages and allows you to use the softkeys to interact with the VVP to save, copy and delete messages. For some reason this has recently stopped working, but the serial message light on/off still turns on/off the light when there is messages. When you power down the voicemail and restart, the full intergration works again. Any input would be appreciated. Thanks