Topic: Aircraft pass through buidlings

Hi - I am a newbie with X-life but am impressed generally with it. It seemed to work well with the German airfields I purchased on the Org store however today I bought Aerosoft - Oslo airfield. When I loaded X-life most aircraft appeared embedded in the terminal and those taxying went through many buildings-  Is this a well known effect? Can I resolve it? Seems a pity the program does not recognise the airport layout - clearly this does not add to the realism (one hopes not at least)
Many thanks Paul