Cannot see AI aircraft from the cockpit in FS9

I recently downloaded an AI aircraft programme for a UK airfield which included two FS2002 aircraft as the AI aircraft. When I installed it all, the AFCAD and Traffic Tools elements worked fine and the AI aircraft appeared as advertised in Spot View, Tower View and Top Down View. But from the cockpit of my FS9 aircraft, the AI aircraft do not appear - either VC or normal 2D cockpit views.All very odd - I have installed many other AI aircaft with no problems.Very grateful for any help on seeing these AI aircraft from the cockpit.