It doesn’t show up in the library, eventhough there is a .png. I do have it installed in the Poser library—maybe it needs to be in the DS “My Library” section—I’ll move it and give it a try from there….
It will only show up in the Poser Formats area if it has a corresponding Poser file of the same name. To use DS MAT pose files inside a Poser Runtime, there needs to be a PZ2 file with EXACTLY the same name, as well as a PNG. When running DS, a small scroll icon will appear in the top left-hand corner to show that the DS script file will be used. In Poser, the DS files do not show at all.