[pstricks] powerdot and xcolor

[Poul Riis]

How can I make xcolor work together with powerdot in the (minimal) example
below? On my screen the golden rectangle appears black.

Yours,
Poul Riis


\documentclass[size=12pt,paper=screen,mode=present,display=slides,style=simple]{powerdot}
\usepackage[dvipsnames,svgnames,x11names]{xcolor}
\usepackage{pstricks-add}

\begin{document}
\psset{unit=5cm}
\begin{slide}{Golden rectangle}
\begin{pspicture}(-0.2,0)(1,1.2)
\uput{2mm}[90](0.805,1){\Large $b$}
\uput{2mm}[180](0,0.5){\Large $a$}
\pstVerb{/phi 1 5 sqrt add 2 div def}
\psframe*[linecolor=Gold1](!0 0)(!phi 1)
\end{pspicture}
\end{slide}
\end{document}