If I convert an item of clothing for genesis in DS I then save as a duf file. I then create the Poser support files. In my DAZ studio content library DS data files are created. For me they are in DAZ 3DStudiodataAuthorProductXXX. 'XXX' represents the name of the item you have just converted. You need to copy this folder, with the idential tree to your Poser folder in which you have all your DSON stuff.

Sometimes conversion does not work. You also need to ensure that the type of item is specified when you convert.

Now I have used DSON in Poser, on reflection, it is a bit of a rushed job. Too many things can trip you up.