Exporting Geometry [Rhino5.0+Grasshopper] to *.dwg file

Hello...

I'm trying to export some geomtry generating with Grasshopper and Rhino5.0 64bit to a *.dwg file...

During the export process everything seems to be ok...

When I try to import the *dwg whit 3D Studio Max 2011 something goes wrong and the file seems to be and invalid format...

Maybe the exporting process of Rhino5.0 save the file whit the newest *.dwg format...Which release is the newest?

I can't use Rhino4.0 for exporting process because the program crashs...

Anyone knows something about this?

See ya...