[texhax] hyperref bookmarks problem

[Jesús Guillermo Andrade]

Dear fellows: Eversince I began my work with tex and latex friends I  
tried to take as much as possible of all the advantages of hyperref.  
However, it seems that its impossible for me to obtain a "clean"  
bookmark index with the resulting pdf, since it is cluttered with  
chinese characters Ithat I have never used in my document. Currently  
this is my hyperref configuration:
%% Ajustes de hyperref. Marcas PDF.
\usepackage[
final=true,
xetex=true,
letterpaper=true,
unicode,
bookmarks=true,
bookmarksnumbered=false,
bookmarksopen=true,
breaklinks=false,
pdfborder={0 0 1},
backref,
pagebackref=true,
colorlinks=true
]{hyperref}
\hypersetup{
pdftitle ={PAM: Plan de Ampliaci\'on y Modernizaci\'on del Aeropuerto  
Internacional Jacinto Lara},
pdfauthor ={Jes\'us E. Barrios y Jes\'us G. Andrade},
pdfsubject ={Terminal del Aeropuerto Internacional Jacinto Lara},
pdfkeywords={PAM, Aeropuerto, Modernizaci\'on, Barrios, Andrade},
pdfcreator	={XeTeX-TeXworks},
pdflang	 ={es-ES}
}

Mind that I render the file with xelatex and I get this kind of results:

-------------- next part --------------
A non-text attachment was scrubbed...
Name: Imagen 1.jpg
Type: image/jpeg
Size: 52129 bytes
Desc: not available
URL: <http://tug.org/pipermail/texhax/attachments/20091103/676d5b0b/attachment-0001.jpg>
-------------- next part --------------



Does anybody has any idea of how can I get rid of those chinese  
characters?

Thanks a lot

Guillermo