[MiKTeX] metapost problem

[<aeb...@in...>]

I was trying to process a metapost file and got the
following output:

> Microsoft Windows 2000 [Versión 5.00.2195]
> (C) Copyright 1985-2000 Microsoft Corp.
> 
> c:\Archivos de programa\metagraf\scripts>mp graf_5.mp
> (graf_5.mp (fl_blanca.mp) (fl_dblwh.mp)C:\texmf\miktex\bin\mptotex.exe "graf_5.m
p" >> "C:\localtexmf\mpx2C4E.tmp\mpx314.tex"
> C:\texmf\miktex\bin\tex.exe -interaction=nonstopmode C:/localtexmf/mpx2C4E.tmp/m
> px314.tex
> This is TeX, Version 3.14159 (MiKTeX 2.2)
> (C:/localtexmf/mpx2C4E.tmp/mpx314.tex
> ! Undefined control sequence.
> l.1 \documentclass
>                   [a4paper,10pt]{article}
> ! Undefined control sequence.
> l.2 \usepackage
>                [latin1]{inputenc}
> ! Undefined control sequence.
> l.3 \usepackage
>                [spanish]{babel}
> ! Undefined control sequence.
> l.4 \usepackage
>                [dvips]{epsfig}
> ! Undefined control sequence.
> l.5 \usepackage
>                {amsmath}
> ! Undefined control sequence.
> l.6 \pagestyle
>               {empty}
> ! Undefined control sequence.
> l.7 \begin
>           {document}
> [1] [1] )
> (see the transcript file for additional information)
> Output written on mpx314.dvi (2 pages, 356 bytes).
> Transcript written on mpx314.log.
> TeX failed on C:/localtexmf/mpx2C4E.tmp/mpx314.tex! Return code: 1
> 
>>> graf_5.mp
>>> graf_5.mpx
> ! Unable to make mpx file.
> l.112 p:=thelabel(btex
>                         etex , (0,0));
> Transcript written on graf_5.log.
> 
> c:\Archivos de programa\metagraf\scripts>

Does anybody knows what happened?. Is anything wrong with
the Miktex 2.2 metapost version?

Best regards

Agustin