As far as I know, the region is in the hardware not software.........usually you can modify your region a pre-set number of times before it becomes permanent.....I have four changes left on mine but I never set a region so it has been 4 for a long time.
If you use Windows, check your DVD drive's properties in Device Manager, if you can still set a region code, you will be able to do it there.
A program called "Region Killer" will fix your problem. Do a search on Google and download it for free. I had similar problem before and this program fixed it.
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