Fully automated way: game must be copied to TV from Content library manager Children and there shouldn`t be any UDN problem. I guess You try to copy it from Games?
If it did not help, some information about nurisam - try the model number closer to your, it doesn`t matter for what region it is
Added.
I think you must read here. This application helps you to have firmware back. Now it is possible to roll back firmware with help of game. Easy.