FYI: I have been using this virtual null modem[^] successfully; it allows you to run both programs on the same computer, having each of them use a virtual serial port which get interconnected using the virtual null modem. So you no longer need two PC systems... :) Luc Pattyn [Forum Guidelines] [My Articles] [My CP bug tracking] Nil Volentibus Arduum Season's Greetings to all CPians.