javaws ans iceweasel config-problem

[B_Kloss <b_kloss@web.de>]

Etch
installed:
Iceweasel
sun-java5-bin   
sun-java5-plugin
sun-java5-jre

Hello,

when trying to start a web-based application, the download of the *.jnlp file 
starts, then iceweasel asks how to handle the file (sun web-java 5) and then 
the "Java-loading"-info pops up. After a few moments the info disappears and 
that's it.
Opening a terminal and starting
javaws nameoffile.jnlp
on command-line the web-application starts as intended.
Normal java-applets are working fine within iceweasel..

Any ideas?
Are there log-files somewhere? I did not find any.

Thank you 

Bernd