Inroads S&S(V8i) export to Microdrainage

I have created a normal drainage alignment in S&S in a SDB file (inlets. pipes and areas). I now want to export this to MicroDrainage.

I have gone to the File - Export - Micro Drainge

The standard.pip file and conduit.sec file is selected from the inroads data folder.

I have set the Micro Drainge Globals file and entered in a micro drainage file name.

When I press save the *.sws file is created however it is empty.

How do I select my drainge layout to be exported?