Autocad 2006 and Architectual Desktop

[Rens]

Hi, I have an Autodesk Archetectual Desktop 2007 file that I'd like to import into Autocad 2006. How do I do this? When I try to load the file directly 2006 and it indicates "the file is not valid."
Thanks

[f700es]

Under File look for Export to AutoCAD. This will flatten down your ADT file to a dumb autocad file with no ADT elements. Here you can also tell it to be an older version of AutoCAD like 06. Remember, 06 cannot open 07 file, ADT or other wise. Good luck :)