Do you have Panelbuilder32 software? You need it. The PV550 is different from the PV600 so you would need to change the PV type in the software before transferring. You need to keep in mind that even with the same PV type (550, 600, 1000) there are other differences such as comm ports, color, keypad/touch that make each PV different in the software. I think that cable may work. What OS is the PC?
Another way without cable could be to use the PCMCIA memory slot on the PV. I have used an adapter type PCMCIA with a CF card to transfer programs. Handy when you make changes and don't want to drag a laptop and cable out on the shop floor.
I have a card. Do you have any instructions on copying the program from the old PV to the new PV. Thanks