help for prosper installation in WinXP

I am using latex and mixtex under windows OS.

 I installed this way :

start-> program-> miktex options 2.3.1281-> packages -> show catalogue

find prosper and click  " + " ( installation )

 but for the simple example as below, I can only get a blue slide, no formula, at all !

 what should I do ? 

 thanks




\documentclass[pdf,azure,slideColor,colorBG]{prosper}
\begin{document}

\begin{slide}{Elementary mathematics}

Observations:

\[
    \int_{-\infty}^\infty e^{-x^2} \, dx = \sqrt{\pi}
\]

\[
    e^{i\pi} = -1
\]

Conclusions:

\begin{itemize}
    \item $\sqrt{2}$ is irrational
    \item $e$ and $\pi$ are transcendental
    \item $42$ and 42 are not the same in \LaTeX
\end{itemize}

\end{slide}

\end{document}



		
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