Using psplot, graphs won't appear on page 2

Question

The following code seems to work (I'm using Texmaker and MiKTeX):

\documentclass[12pt,letterpaper]{article}
\usepackage{pstricks}
\usepackage{pst-plot}

\begin{document}

\begin{center}
\psset{unit=.4cm}
\begin{pspicture}(-11,-11)(11,11)
\psaxes[Dx=5,Dy=5](0,0)(-11,-11)(11,11)
\psplot[plotstyle=curve,linecolor=red]{-2}{2}{2 x 2 exp mul} 
\end{pspicture}
\end{center}

\begin{center}
\psset{unit=.4cm}
\begin{pspicture}(-11,-11)(11,11)
\psaxes[Dx=5,Dy=5](0,0)(-11,-11)(11,11)
\psplot[plotstyle=curve,linecolor=red]{-2}{2}{x 3 exp} 
\end{pspicture}
\end{center}

\end{document}

I get two graphs on one page. BUT if I change the psset commands to .5cm, so that the second graph is forced to appear on page 2, I get a MiKTeX problem report, as follows:

MiKTeX Problem Report
Message: Some PostScript specials could not be rendered.
Data: Error: /undefined in tx@Dict
Operand stack:
   --nostringval--   PermitFileReading   --nostringval--   PermitFileWriting   --nostringval--
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--
   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false
   1   %stopped_push   1914   1   3   %oparray_pop   1913   1   3   %oparray_pop
   1897   1   3   %oparray_pop   1787   1   3   %oparray_pop   --nostringval--
   %errorexec_pop   .runexec2   --nostringval--   --nostringval--  --nostringval--
   2   %stopped_push   --nostringval--
Dictionary stack:
   --dict:1166/1684(ro)(G)--   --dict:0/20(G)--   --dict:78/200(L)--
   --dict:95/300(L)--   --dict:37/200(L)--
Current allocation mode is local
MiKTeX GPL Ghostscript  9.00: Unrecoverable error, exit code 1

Source: Libraries\MiKTeX\Dvi\Ghostscript.cpp
Line: 372
MiKTeX: 2.9
OS: Microsoft Windows 7 Business Edition, 64-bit Service Pack 1 (build 7601)
Invokers: explorer/texmaker
SystemAdmin: yes
PowerUser: no
Root0: C:\Users\Ken\AppData\Roaming\MiKTeX\2.9
Root1: C:\Users\Ken\AppData\Local\MiKTeX\2.9
Root2: C:\ProgramData\MiKTeX\2.9
Root3: C:\Program Files (x86)\MiKTeX 2.9
UserInstall: C:\Users\Ken\AppData\Roaming\MiKTeX\2.9
UserConfig: C:\Users\Ken\AppData\Roaming\MiKTeX\2.9
UserData: C:\Users\Ken\AppData\Local\MiKTeX\2.9
CommonInstall: C:\Program Files (x86)\MiKTeX 2.9
CommonConfig: C:\ProgramData\MiKTeX\2.9
CommonData: C:\ProgramData\MiKTeX\2.9

I'm new to this. Can anybody help me understand what is going on?

Answer 1

I have no problem when compiling your MWE with 0.5cm. Anyway, you can use algebraic option to write 2*x^2 instead of 2 x 2 exp mul. Use \newpage to obtain a new page. And use figure to obtain floating figures in your document.

\documentclass[12pt,letterpaper]{article}
%\usepackage{pstricks} 
\usepackage{pst-plot} % loads pstricks automatically

\begin{document}

\begin{figure}
\centering
\psset{unit=.4cm}
\begin{pspicture}(-11,-11)(11,11)
\psaxes[Dx=5,Dy=5](0,0)(-11,-11)(11,11)
\psplot[plotstyle=curve,linecolor=red,algebraic]{-2}{2}{2*x^2} 
\end{pspicture}
\caption{Quadratic}
\label{fig:Quadratic}
\end{figure}

\newpage
\begin{figure}
\centering
\psset{unit=.4cm}
\begin{pspicture}(-11,-11)(11,11)
\psaxes[Dx=5,Dy=5](0,0)(-11,-11)(11,11)
\psplot[plotstyle=curve,linecolor=red,algebraic]{-2}{2}{x^3} 
\end{pspicture}
\caption{Cubic}
\label{fig:Cubic}
\end{figure}

\end{document}