Modem software on Window 2003 Server

I have a faxmodem attached a server running Windows 2003 Server. I use the

server as a terminal server and to receive faxes. I send faxes using an

email fax service. The faxes received are forwarded to a folder on my file

server. I use the Microsoft fax program that’s part of the OS. My problem

is that the faxes are missing a line or two per page. I called the maker of

my faxmodem and they said I needed to make some flow control setting changes

however the Microsoft program doesn’t allow you to make flow control changes.

Is there a simple program that works on Windows 2003 server I can use which

would allow me to make these changes and do everything I had done previously

such as forward the faxes to my file server.