that's fucking weird. i checked out your mapping.xml and it was totally correct. i also used it in my game and it also worked. you also placed it in the correct folder. i can only see two differences to folder. the first one is just cosmetic and won't change anything (but it's always good to enable it ^^):
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it enables the filename extensions. progamers and modders ALWAYS have it enabled XD. with that you can change the extension of a file and change its function.
the other however miiiight solve ya problem. i saw that you mapping.xml is blank white. this means for me, your computer doesn't know how to open it when you left click on it. it would still be quite strange, but if faerin didn't tell the pc ingame how to open the mapping.xml, it won't use it and will simply skip it if it doesn't know how to open such a file on its own. at least that's my presumption.
here the trick on how to tell your pc to automatically open such a file when prompted:
right click on mapping.xml and click on "open with". now you might see some programs like internet explorer and editor aaaaand another option: "choose standard program". it will prompt you to choose a program now. simply use editor.
i honestly doubt it will work, but better safe then sorry, right?
last but not least, if NOTHING works, please send me your WHOLE game via sendspace.com (put it in a zip file and upload it there; send me the downloadlink afterwards; i don't need your savefiles just your gamefolder). maybe something is off there.
by the way just asking: you did try a new game, or? don't load a save. test it out without loading.
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