[XeTeX] \XeTeXmathcode problem with amssymb

[Mehdi Omidali]

Thank you. I have another problem. After compiling the followings

\documentclass{article}
\font\tenrgm="Scheherazade" at 15pt
\font\sevrgm="Scheherazade" at 9pt
\font\fivrgm="Scheherazade" at 7pt
\newfam\fardig
\textfont\fardig=\tenrgm
\scriptfont\fardig=\sevrgm
\scriptscriptfont\fardig=\fivrgm
\XeTeXmathcode`2="7 \fardig "06F2%
\begin{document}
$$\mathbf{y}2x^2$$
\end{document}

again it doesn't display digits.