xml file displays locally, but not on server

[Birgit Kellner]

Using Mozilla 1.3, the following file displays locally, but not when 
uploaded to a server:

http://mailbox.univie.ac.at/Birgit.Kellner/xmltexts/trimsika_frauwallner.xml

There are a number of potential error sources, as it uses both an 
xsl-stylesheet and, from within that, a css stylesheet. The CSS 
validates, as does the XML file. But what puzzles me is that it does 
display locally, and that the same file also displays on the server with 
Mozilla 1.2b. It also displays with IE 6.

Any clues?

Thx,

Birgit Kellner