Thank you for all trying to help :)

Yes, it started as T-pose and brought into Cloth room to do the clothify.

Everything works OK if I keyframe and pose it manually without  WalkDesigner  .

But when I try clothify with WalkDesigner, the part below the hip works OK but the arms did not work as seen in the attached image.

I try parent the dress to James hip and still having the same problem.

Ans yes, I've checked both the "Ignore Head collisions " & "Ignore Hand collisions ".

btw, are there any online tuts or video on this subject ?