gain data from multiple xml files?

hi!

i have a file "navigation.xml" from which i create the navigation bar
and i have multiple .xml files for example "september.xml" and
"august.xml" from which i generate by using blog.xml a blog.

i want both the navigation and the blog combined on a website but when i
call xsltproc with:

xsltproc -o index.html index.xsl navigation.xml blog.xml it only
processes the blog part.

when i change order or leave one of the .xml away, it renders only the
one xml i used on the commandline.
when i leave both out i do not get any .html.

what may i have done wrong?

-josef

ps: i put my files online at http://www.daemon.li/xml/
thanks for your help
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