[pstricks] pdfLaTeX + A0poster + pstricks + pst-pdf -> pspicture

[Amelio]

Hi again,

I'm working with MikTeX and I updated all the packages last week.

Here is the code I tried:

%---------------------------------------------------
\documentclass[portrait,a0]{a0poster}
\usepackage{pstricks}
\usepackage{pst-pdf}

\begin{document}
\psset{unit=1cm}
\fbox{\begin{pspicture}(-3,-3)(70,105)
\psgrid(0,0)(70,105)
\end{pspicture}}
\end{document}
%---------------------------------------------------

And here are the commands:

%---------------------------------------------
pdflatex file.tex
latex file.tex
dvips -o file-pics.ps file.dvi
ps2pdf file-pics.ps
pdflatex file.tex
%---------------------------------------------

This is what I get with the above code:
http://img380.imageshack.us/img380/1726/a0samplexy3.png

That's, the grid doesn't reach the upper-right corner of the canvas.

Thanks in advance
-- 

Amelio V.
Grad student