[XeTeX] Latex+Tamil

[Sengottuvel]

Dear all,

  I  following this code.

 \documentclass{article}

\usepackage{fontspec}

\setmainfont{DejaVu Serif}

\newfontfamily{\tam}[Script=Tamil]{Lohit Tamil}

\defaultfontfeatures{Scale=MatchLowercase}

\begin{document}

நலம்

\end{document}


Error Message:

! Fatal fontspec error: "not-pdftex"

!

! Requires XeTeX or LuaTeX to function!

!

! See the fontspec documentation for further information.

! For immediate help type H <return>.

Now i am using Texlive2010 and Ubuntu10.10.


What solution.,.,.
-- 
with regards,
T.Sengottuvel
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