这篇文章有什么问题？通过 XeLaTeX 编译失败

Question

我写了一篇文章如下。

      \documentclass{article}
      \usepackage{fontspec}
      \usepackage{unicode-math}
      \setmathfont{Asana Math}
      \setmainfont{Bitstream Vera Serif}
      \begin{document}

      \begin{equation}
              \max\sum_{(i,j)\in A}c_{ij}x_{ij}
      \end{equation}
      \end{document} 

不幸的是，它无法通过 XeLaTeX 制作 pdf...

      Package scrlfile, 2009/03/25 v3.03 KOMA-Script package (loading files)
              Copyright (C) Markus Kohm

      ) (d:\CTEX\MiKTeX\tex\latex\unicode-math\unicode-math-table.tex))Running          
       miktex-makemf.exe...
      miktex-makemf: The ICU source file could not be found.

      Running hbf2gf.exe...


      hbf2gf (CJK ver. 4.8.0)



      Couldn't find `I.cfg'

      miktex-maketfm: No creation rule for font ICU.

      ! Font \zf@basefont="Asana Math/ICU" at 10.0pt not loadable: Metric (TFM) file
      or installed font not found.
      <to be read again>
               \scan_stop:
      l.5 \setmathfont{Asana Math}

      ? 

我确信我确实安装了这些软件包。所以这让我很困扰。