Project Airbus Shenzen Airlines A320's missing in FSX

Hello all. I am very new to the whole flight simulation world but find it immense fun. FSX is very nice and have had no issues so far. Recently i found couple of nice Project Airbus Shenzen Airlines packages with wonderful textures. One package containing two aircraft, A319 and A320 was added no problem. The second package contained three A320's with three different textures, "The Universiades specials". In the FSX change aircraft menu only one variation shows even when i check the "all variations" box. Any ideas? are very much appreciated.