I'm using 12.10b

I cannot seem to get Comment Fold Strings working. I've copied and pasted from the syntax.txt file and the help file, but still I cannot get the following to fold:

#Region
asdf

#End Region

A [-] appears next to the #Region but it refuses to fold.
I have the following in my wordfile.txt
/L20"UNIX Shell Scripts" Line Comment = # Escape Char = \ String Chars = "'` File Extensions = sh ksh csh SH KSH CSH
/Delimiters = ~%^+|\/{}:;"'` , .
/Function String = "%[a-zA-Z_]*)"
/Indent Strings = "{" "then" "else" "for" "do" "case" "function"
/Unindent Strings = "}" "else" "fi" "endif" "done" "esac" "exit" "return"
/Open Brace Strings = "{" "(" "[" "if" "do" "case"
/Close Brace Strings = "}" ")" "]" "fi" "done" "esac"
/Open Fold Strings = "else" "then" "do" "case" "elif"
/Close Fold Strings = "else" "fi" "done" "esac"
/Open Comment Fold Strings = "#Region"
/Close Comment Fold Strings = "#End Region"

Thank you Mofi

So is it a bug in the documentation when it says the following will work:
/Open Comment Fold Strings = "#Region"
/Close Comment Fold Strings = "#End Region"
?

The documentation does not contain the delimiters and comment specifications for this example. So this example works perfect for example for C/C++ when "#Region" and "#End Region" are ANYWHERE inside a C/C++ line or block comment. # is for C/C++ normally not a delimiter.