If you have not gone through your bottle of Excedrin yet, there are a few more important things to do:  First you need about 10 draping frames selected.  Then run Calculate Drape (if it takes over 10 seconds to start with frame 1 while the counter is around 11 or 12 and climbing, you have the wrong collision selected (right now you have the default one--nothing is checked).  Cancel and select the first one (Object vertex against cloth polygon), start Calculate Drape again, the right collision format will go throught the 10 frames in about 20 seconds or less and it will look great (the rest will look like bird dodo on a clean shiny car).

Next, select a chair and seat V3 in frame 30.  Don't worry about the dress position or where it's at.

Go back to frame one and ensure, repeat ensure that the chair is selected as well as various parts of V3 for collision avoidance.  Start ye olde simulation  Jan