Hi Nigel,
1. My guess is that you have not downloaded and/or properly placed the VA config file on the correct folder. Just download the ACH FSP VA config file by going to your profile and click that tab on the right which will show your personalized config files. download the FSP config file (ZIP) and then read the readme files. Extract/place the ACH VA config file to your FSP folder.
After that on FSP go to company manager and set up a new airline and also a new pilot. After that, you have to book a flight from the site. Note the fight number. Copy that flight number on your FSP flight. Otherwise, the system will not accept ur pirep.
then fly land, etc.
then export to the VA you created above (clue: ACH).
Then you will know if set up is correct because it will show that 1 fight successfully exported.