My white box issue

[Landiin]

I've been stumped by a little display issue, so I'm putting it here so maybe someone can figure it out or see what I am missing.

The issue is in header frame of the datagrouper. The style /CommonElements.DataGrouper.data.header_frame.rect uses three images; west, center and east. In the UIBuilder when you use this style it works as it should, however in game the west side shows up as a white box.

I've looked at the alpha channel and it appears to be correct. I can't find a reason for it to do this.

I've include all files needed to examine, including the Photo Shop file eXtreme_WindowFrames.psd along with it's eXtreme_WindowFrames.dds counter part.

It's probably something simple I've overlooked or don't know about. In either case I hope someone can solve it.