Hi all. I'm new to this group and not an Autocad user. However my father is and it on his behalf I'm doing this. He is running a windows Xp pro machine and wants to have his old copy of Autocad release 14 with AEC 3.1 running on it. Now I have got Release 14 on no problems, and AEC seems to install ok but doesnt appear to be runable in anyway. Is this owing to a missing dongle? Or have I gone wrong else where? If I am barking up the wrong tree is there a method to get some of the old objects from AEC to a more modern Autocad, items such as "stud/cavity walls". Any help gratefully recieved. David