Try these changes:

Ambient value = 0

Specular color = white, since it's controlled by the texture map.

Specular value = 0.25, and plug the transparency map (sky blue wires) into the value to avoid highlights where the dress is supposed to be transparent.

Transparency edge = 1, since it's controlled by the transparency map.

Transparency falloff = 0.6, to give a smooth transition (only needed when trans value is not equal to trans edge value, but it's a bad habit to set the falloff to 0 or 1).

Bump = 0.0083 (a rough guess)

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5