Abacus fly the airbus fleet A340 Missing the cabin

[8800GT]

Hi i bought this package a while back and shortly after buying it i stopped using it because half the cabin wasent there ? If i started in the red business class cabin at the front of the aircraft and walked down (this is with the fsx key movements ) I go into the next cabin and carry on walking through i then move into the next cabin a little larger than the first two and thats it no more cabin if i walk through the wall i end up outside. This isnt even half way down the plane infact im still infront of the wing ! And i have seen youtube videos of people with active camera walking right through all the cabins from the back of the aircraft to the front. I am really confused with this as the a320 included in this kit has near enough full cabin. I would be very gratefull if someone could help me with this . I can provide screenshots if nessecary. Ok thanks