I had the same issue with SuSE 9.1 and solved it thusly:

Edit the trio.xml file in the /usr/local/trio directory:
- Change
<http-server port="8090"/>
to:
<http-server port="8090" root="usr/local/trio"/>

Note that this assumes that you've put stuff in /usr/local/trio. You should substitute your path if it is different.