OTF fonts with Miktex [closed]

Question

This is my code:

%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode

\documentclass[a4paper]{article}
\usepackage{fontspec}
\usepackage{xunicode}
\usepackage{xltxtra}
\setmainfont[Mapping=tex-text]{Brill-Roman}
\begin{document}
This is a text.
\textit{Here goes!}
\end{document}

I have updated the admin package manager successfully, but it still doesn't work:

This is XeTeX, Version 3.1415926-2.4-0.9998 (MiKTeX 2.9)
entering extended mode
("C:\Users\Guillaume\Desktop\Medlye\Brill roman essai.tex"
LaTeX2e 
Babel  and hyphenation patterns for english, afrikaans, ancientgreek, ar
abic, armenian, assamese, basque, bengali, bokmal, bulgarian, catalan, coptic, 
croatian, czech, danish, dutch, esperanto, estonian, farsi, finnish, french, ga
lician, german, german-x-2012-05-30, greek, gujarati, hindi, hungarian, iceland
ic, indonesian, interlingua, irish, italian, kannada, kurmanji, latin, latvian,
 lithuanian, malayalam, marathi, mongolian, mongolianlmc, monogreek, ngerman, n
german-x-2012-05-30, nynorsk, oriya, panjabi, pinyin, polish, portuguese, roman
ian, russian, sanskrit, serbian, slovak, slovenian, spanish, swedish, swissgerm
an, tamil, telugu, turkish, turkmen, ukenglish, ukrainian, uppersorbian, usengl
ishmax, welsh, loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"))
("C:\Program Files\MiKTeX 2.9\tex\latex\fontspec\fontspec.sty"
(C:\Users\Guillaume\AppData\Roaming\MiKTeX\2.9\tex\latex\l3kernel\expl3.sty
("C:\Program Files\MiKTeX 2.9\tex\xelatex\xgreek\expl3\l3names.sty")

LaTeX Warning: You have requested, on input line 48, version
               `2011/12/30' of package l3names,
               but only version
               `1998/04/20 v2.0b L3 Experimental Naming Scheme for TeX Primitiv
es'
               is available.


! Package expl3 Error: MismatchedLaTeX3packagesdetected..

See the expl3 package documentation for explanation.
Type  H   for immediate help.
 ...                                              

l.59   }