Problem importing 3ds files

I import 3ds files using 3D Exploration, it works well but I’ve got one problem: the objects are a bit upside down. I have to do a glRotated (-90.0, 1.0, 0.0, 0.0) to get them facing right.

Does anyone know a solution?

the 3ds coordinate system is differant than opengls coordinate system. either swap coordinates or rotate them to get the correct orientation.