MetaPost problem under MikTex 2.9 x64 / WinEdt

*Hi,

here is a simple .mp sample and the mp-execution error response with 
comments. Do you know what is going wrong (in 10 years old MikTex / 
WinEdt versions the program used for LaTeX was executed correctly due to 
a localtexmf file written by an expert)? *
/*
mp-program name: testlabel.mp*/

verbatimtex

\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\begin{document}
etex
%%%%%%%%%%%%%%%%%%%%%%%% testlabel.1
beginfig(1);
numeric u;
u = 1mm;
z0=(0,0);
pickup pencircle scaled 1pt;
draw z0;
endfig;
%%%%%%%%%%%%%%%%%%%%%%%% testlabel.2
beginfig(2);
numeric u;
u = 1mm;
z0=(0,0);
pickup pencircle scaled 1pt;
draw z0;
label(btex $0$ etex, (3u,3u)); /*%causes the problem*/
endfig;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bye

/*Executing MetaPost with MikTex 2.9-x64 / WinEdt 6.0 (same with MikTex 
2.5 / WinEdt 5.5) yields*/

 >> testlabel..mpx
! Unable to make mpx file

1.27 label(btex
                         $0$ etex, (3u,3u));
The two files given above are one of your source files
and an auxiliary file need to read to find out what your
btex..etex blocks mean. If you don't know why I had trouble,
try running it manually through MptoTeX, Te, and DVItoMP
1 output file written: testlabel.1

*I do neither understand this, nor do I know how to follow the advice of 
running the file manually... In fact, I only need to know how to make 
the mp program running -- and to get, maybe, some explanations 
afterwards (if they could be understood by a non-expert). *

*There are several other problems (activating dvi-yap inverse search, 
activating \begin{...} * \end{...} features, activating some localtex.mf 
file which contains often used images, style files, logos or programs 
like "foils",...). Unfortunety, reading several parts of the included 
manual resulted in the feeling to be completely lost, as I did not learn 
how to solve only one of the above problems. In any case, I do not like 
to modify ini files.

Does MikTex 2.5 properly work under Windows 7 32bit? Indeed,  think of 
returning to parent versions of MikTex 2.9.

Looking forward to your answer
with best regards
Lutz


/
/*
------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security 
threats, fraudulent activity, and more. Splunk takes this data and makes 
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2