Exporting to 2007 while viewing the objects in 3d worked! That's so strange that viewing it in plan doesn't allow it to export the 3d properties.....thanks!

First off I have Autocad Architecture 2009 and Sketchup 7. I have read the threads on here that tell me to "Export to Autocad 2007" and I have done that but when i go to import the file into Sketchup none of the walls/windows etc. are in 3d. Is there a way to keep the 3dimensional nature of these objects?