AFCAD for Hong Kong. Help Please!

I've got the Thomas Kwong Hong Kong Int scenery (VHHH) but try as I might, I can't get any AFCAD file to work with it!
I have half the AI in there that there should be (leading me to think the default file is still active) and they are either in the wrong place or parked IN buildings, jetways, etc!
The files I have downloaded all just say to place the AFCAD in the Addon scenery/scenery folder but this isn't working. They can't all be duff so must be something i'm doing. Please help!!
I have half the AI in there that there should be (leading me to think the default file is still active) and they are either in the wrong place or parked IN buildings, jetways, etc!
The files I have downloaded all just say to place the AFCAD in the Addon scenery/scenery folder but this isn't working. They can't all be duff so must be something i'm doing. Please help!!