RE: Jar-Problem extension installation

> unopkg still has trouble executing the registration Java code at
> at.univie.MidiCSD.impl.RegistrationHandler in your MidiCSDext.jar, but
> the empty CannotRegisterImplementationException message is of course
> unhelpful in finding out why.
> 
> Do you have an empty class path now?  (Also, I am not completely sure,
> but I think unopkg should use class path settings from OOo's "Tools -
> Options... - Java" dialog, not from the CLASSPATH environment variable;
> please check those settings, too.)

I played around with my RegistrationHandler (default class from
eclipse-plugin). It had problems with getting the resource of the
class-names.

But now my problem is: the RegistrationHandler can't load any classes.
They are in the jar-file but something is going wrong when I try to
Load them. With Class.forName()

Any ideas what my mistake is?

Thanks a lot for your help!