Thanks but we are not trying to change the programming, the unit is beginning to fail and we need to copy the program to a compact flash card and install it on a newer 550. I got into the program mode with the help mentioned earlier but the only compact flash card we have right now is 64gigs and the machine can not use it, says 64megs is limit. The search goes on now. Is teamviewer available? Maybe I can copy the program through the ethernet port. Thanks in advance.