Problem with nero (last version)

When I try to burn a data CD, all the files and folders are renamed and these don't maintain their original names when they are recorded, why? I've never experienced this problem with nero. I've looked the options and all seems ok.
Files and folders names are capitalized and renamed with large underscores. Only if I select to see the original view, the files are showed with their original names, but then they are recorded how I said before ?¿?¿?¿?
 
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