A couple of things spring to mind here:
1, You must use the IR interface from DeltaP as the inbuilt ones you get on many PCs/Laptops use a different protocol. In addition, you must contact the company who sold you the interface with the serial number of your VR3 so they can give you the download PIN.
2, Put your VR3 into Dive Now mode (from the front screen) before you start the download or, when you put it into download mode, the unit will switch off. Not handy as the download mode's screen is blank!
