The client uses FM Pro. They will be between offices for a few months. My feeling is that they would get better performance with FileMaker Pro running on a Terminal server on a Windows 2003 server, rather than having their 10 users trying to connect directly over the Internet.
They have version 8.5 at the moment.
They are unable to connect to a FileMaker server via TCP. The error message appears:
"FileMaker cannot share or be a client of a file because the networking stack could not be initialized'