This is an Emacs bug, not a Dired+ bug, I believe. Emacs on Windows cannot handle Unicode chars in file names. This has been filed as a bug since at least 2010, but it was relegated to the "wishlist", so it's unclear when or whether it will ever be fixed.
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15236
Description of a possible fix
The problem is that the mainline Emacs code uses APIs that don't accept wide characters. Examples include 'stat', 'access', 'open', 'fopen', etc. To fix the problem, we'd need to provide our own implementation of these APIs that would accept a UTF-8 encoded file name, then re-encode the file name in UTF-16, and call the Unicode APIs as part of the implementation. This is a large job.
solved in Emacs 24.4
IT finally works in Gnu Emacs 24.4