Blue - if you can't make the skirt move either by dragging the body handles or by turning the dials then it sounds like your scene has corrupted. Try deconforming the skirt (select "none" from the list) and  then reconforming it to the figure. If that doesn't work you may have to start your scene again.
  I've just had a play with the Vandra skirt -the handles are called "Lefthandle, Right handle, Backhandle and Loinhandle" If you select any one of those you should get 3 dials - all seem to work for me.

Not sure what you mean by a trim: the Vandra skirt can look a little strange in preview, as you can't see the "inside" of the cloth, only the outer surface. The whole thing shows when you render.

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