First, make sure you're conforming the shoe to the P4 female, not to something else. (Been there, done that.) If that isn't the issue, I'd suspect a corrupted .rsr file. Poser doesn't actually use .obj files. It makes a copy of them with the extension .rsr. Those files become corrupted a lot. You'll have to close Poser and do the following: Go to the Runtimegeometries folder and find the folder that has the shoe .obj file. (I deleted out my P4 female stuff, so I don't know which folder it is.) Delete the .rsr file that is in the same folder as the .obj file. (Do NOT delete the .rsr that is in the Runtimecharacter folder! It will get rid of the icon that you see in the library to indicate what the shoe looks like.) Open Poser back up and try again. That should fix it. If you're not sure exactly which .rsr file in the RuntimeGeometries folder is causing the issue, delete them all. Just make sure you're inside the geometries subfolder, not the library subfolders. This solves all sorts of dumb issues with Poser items. It's the Poser equivalent to "turn the machine off; wait 30 seconds; then turn it back on." Hope this helps.