Rudolf -

If your running the Blackdown Java on a machine with the X/Windows libraries not installed, then your
jserv.properties file should include a line to set the NS_JAVA environmental variable. I had problems that
looked similar to yours until this simple fact dawned on me. If this might be the case, just add the following
to the aforementioned configuration file...

wrapper.env=NS_JAVA=N

Hope this helps.

--
Bill Sofko
Publisher, Contrariwise