Thanks guys for your help, I've been trying in several ways to make this import thing work, but with no success for the moment. It is not possible to load the old 3ds files made in Autocad. My suspect is the same you all have guys, since I installed the ad2005 I haven't been able anymore to import 3ds files. I've also installed the latest update, as nanotyrannus suggests, but nothing has changed. I'll keep on trying other ways...I have to get this sorted 'couse I have work to get done...