Ram SS Floor Vibrations

I would like to check floor vibrations using the AISC DG11 method in Ram SS. I have wide-flange girders, bar joists @ 24" o.c. and a 3" slab on 9/16" form deck. The program refuses to run and says that I don't have composite deck properties defined.  Form deck is non-composite.  Does Ram SS require composite deck instead of form deck?

Do I need to figure out a work-around for this?

Also, do I need to redefine my bar joists as simple spans?  I have 30" joist extensions (cantilevers).  Should I just have steel beam stub cantilevers 30" long every 24" O.C. or perhaps have a 30" deck edge offset?

Help please!