PSTricks plot 3d

\documentclass[11pt]{article}
\usepackage{pstricks}
\usepackage{pst-3dplot,infix-RPN}
\pagestyle{empty}

\begin{document}

\begin {figure}[h]

\begin{pspicture}(-5,0)(15,10)
\psset{unit=30.0mm,Alpha=45, Beta=15,linecolor=blue!60,linewidth=1.5pt}
\infixtoRPN{y*x^(2)}
\psplotThreeD[linecolor=blue,drawStyle=xyLines](-1,1)(-1,1){\RPN}
\pstThreeDCoor[xMin=-.5, xMax=2.0, yMin=-.5, yMax=2.0, zMin=-.5, 
    zMax=1.5,linecolor=black,linewidth=0.6pt]
\end{pspicture}%

\end{figure}
\end{document}