first attempt to run mp

["Pawel Jackowski na Onet" <jackos1@poczta.onet.pl>]

Hi all!

I've just made a quick test -- running metapost with ConTeXt. The sample
code was just:

    \starttext
     The simplest metapost code sample
    \startMPgraphic
     fill unitsquare scaled 123 withcolor (.2,.3,.4) ;
    \stopMPgraphic
    \stoptext

which looks ok, right? And of course mpost creates nice navy square from
that code. But running

    texexec  --automprun sample.mp

cause a serious system error; ''There is a problem with mpost.exe and bla
bla bla''. Smart and clever' windows XP try to report that problem to
microsoft.
The problem occur just after terminal says

    This is MetaPost,  Version 0.641 (Web2c 7.3.7x)
    (mpgraph.mp

and after that system display an error box.
As manual says I 've made some changes in texmf.cnf:

    openout_any = a
    shell_escape = t
    allow_multiple_suffixes = f

What should I do next to catch 'serious system error' while running metapost
code included in tex code?
Is the problem comonly known?

Thanks, Pawe/l