if "\xe4"=="\xe4" failes,why?

[mbbill]

I met a very strange problem recently, that is
when I set the following options:
set encoding=utf-8
set ignorecase
then the expression: if "\xe4"=="\xe4" fails.
I test it using:
if "\xe4"=="\xe4"
   echo "test"
endif
but I got nothing output, why ?

  

-- 
Best regards,
 mbbill                          mailto:[EMAIL PROTECTED]