Windows Vista direct Ehternet connection

hi. not sure if this is the right forum but it seems right.

developing a SmartStar system that will provide data via FTP mainly over a direction connection to a laptop. crossover cable and default IP works fine on my desktop XP machine. but I cannot get a Vista laptop to communicate with the Rabbit system. (I would go back to an XP laptop or load XP on this laptop but customers will have Vista machines.)

anyone know how I can get this to work?

found one forum post with a question about Vista that seems to be similar to my problem. but the post was a year and a half ago and does not appear to have been answered.