Windows 2003 - Acceleport RAS 8 failure

Hi,

I’ve installed an Acceleport RAS 8 card in a Windows 2003 Server, which is used as a dial-up access server

We are having problems everyday
we frecuently need to reset the modem ports in failures

the message into event log is :
The communication device attached to port COM x is not functioning

Any idea ?

Thanks