[R] Has anyone used Sweave with the Beamer poster macro for Latex ?

[Paul]

Hello,

I'm trying to make a poster in Latex using the beamer poster macro 
(http://www-i6.informatik.rwth-aachen.de/~dreuw/latexbeamerposter.php), 
and use Sweave to add in R output.

This works fine for adding graphics and tables, but if I want to put 
code in, the file fails to build in Latex.

My Rnw file looks like
\documentclass[final,hyperref={pdfpagelabels=false}]{beamer}
\mode<presentation> {
\usetheme{Berlin}
}
\usepackage{sweave}
\begin{document}
\begin{frame}
    \begin{columns}
       \begin{column}
          \begin{block}{A Block}
             Some text
<<label=sweave, include=TRUE, echo=TRUE>>=
x<-rnorm(100,mean=100,sd=15)
print(x)
@
          \end{block}
       \end{column}
    \end{columns}
   \end{frame}
\end{document}
but this doesn't work.  Has anyone else done this ? Any ideas ?

Thanks

Paul.