Exporting rhino to obj with layers

Hi, I’m using rhino 4 and I need to export a file with 2 layers with different names to obj file, when I do that and open the odj the 2 layers merge 2 one with out my given names. What can I do?
Thank you

Hello - as far as I can see, viewers see the layers as names for the obj objects.But I see that Rhino4 reads them into one layer. V6 sees the two layers correctly.