Archicad model export to Sketchup please help

[Anonymous]

When i import my model from archicad to sketchup the model gets divided by lines (each wall gets divided into many pieces) i dont want that i want it to stay the same..... i explained in details down and added a picture.

When i save my model from archicad 14 i save it as (3d studio file) and then open it on sketchup 8 by importing it, but my problem is for example if i had a wall that is curved its going to be divided into lots of parts by lines and i dont want that because each piece i should deal with it alone which is much harder so please if u know a way of having the model as it is (each wall stay one wall without getting divided) please help... thanks
i will add a picture to make my self clear.

[Anonymous]

and this is how it comes on sketchup