Problem with PSTricks using MikTex 2.9

I am trying without success to draw a diagram using the latex package 
PSTricks.  A minimal version of the the command sequence that I am using is:

\documentclass{article}
\usepackage{pstricks}
\begin{document}
\begin{pspicture}(-1,-1)(5,2)
\psline(0,0)(4,0)
\psline(2,0)(2,1)
\end{pspicture}
\end{document}

When I try to compile these commands using latex  in MikTex 2.9 (under 
WinEit 6), I get the message:
        "MikTex Problem Report.  Some PostScript specials could not be 
rendered."

Exactly the same commands compile without any problem using PCTex 6 
instead of MikTex 2.9 (but unfortunately PCTex 6 will not work for my 
whole project).

I have uninstalled and then reinstalled MikTex (under Windows 10) but 
this doesn't help.

I really need to draw a lot of similar pictures  in an article, and I 
have hit a wall here.  Any suggestions about how to avoid this PSTricks 
problem using Miktex will be greatly appreciated!

Bruce





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