what are the DP entries?
try deleting the filelist.dat file in the SCENEDB/weapons/scenery folder. don't worry CFS2 will make a new one.
not sure what else to do. i'll add the plane and see what i get.
ok after installing the Spitfire MKIII i had no issues.
but if you installed the SAAF Spitfire then you will need the file Spitup.zip from MW's site.
check that and it should be good to go.
verify that you have these DP entries as shown,
[PAYLOAD.1]
; Payload = Guns Only Long Range
mount.1=spit_slipper_tank, 1, -1
thats all i've got.