Hello,
one question, it seems that you do not use a FDD for the Installation.
As I know the NCM COM 1430 TCP a bit I would recommend the use of a FDD really strongly. It may sound a bit strange, but this Software is based upon Software that is over all based on PCPM OS or MS-DOS. You should really use a FDD, a installation from a Network drive usually will not work.
Best regards
J_Bell