Incoming Connections for Windows 2000

I have a problem with windows 2000 server. When the incoming connection is open and loaded, the modem will not auto answer or respond. If you load Hyperterminal, the modem wont respond after the incoming connection has been loaded, but after it has been closed, you need to reset the modem before the modem will answer the incoming calls. Removing the Incoming connections and resetting the modem allows hyperterm to talk to the modem ok.