Your Cloth Density is quite low. In my experiments so far, having it as low as that will make it reluctant to drape much. Try a higher value, around about 0.05 to 0.075. If it's still not draping right, increase it a bit further, perhaps to 0.1. If the skirt starts to fall through the figure's legs and the divan, you've gone too high and a lower Cloth Density is needed.

I only know this because it's the exact problem I was having for most of Saturday and Sunday!