First of all, an .OBJ alone can't contain textures files. It always works with a .MTL file containing the data. Therefore, that's the first thing to look for. Do you have the .MTL file in the same folder as the .OBJ?
Could you share more details on the issue? A full screenshot of the object in Stager vs in Blender? If needed, you can even send me the .SSG file at cdellenbach@adobe.com and I'll take a closer look.