I have MAT files that stop working after 2 or 3 uses. :( I went nuts trying to figure out what was wrong in my MAT files, but I loaded them into P4 and they worked just fine. I wasted over an hour trying to troubleshoot my files before I loaded them in P4, only to see them work perfectly every time! I then tried other MAT files and they didn't work consistantly, either. Yes, I'm on the latest crutch ... patch. Really nice cabinet, by the way. It looks a lot like ones I've seen for sale in furniture stores.