All you have to do ith these boxes is:-
1. plug in box to the wall.
2. join up box to pc with null modem cable.
3. click download - and wait until message download complete appears. You should also wait until the box displays numbers again (i.e. 0001).
If the download is not taking try having the box turned off then hit download and quickly turn the box on. it may take a couple of trys or put the box in standby mode.
it may be you have a faulty com port on your pc?