Java + Image/File Browser Problem (Err. 500)

Hi everyone,

I know that the issue with the XML Request Error 500 and the image/file- browser is pretty common and that there are many solution suggestions, but my problem is somewhat strange:
I can create folders and upload files without any problem, but they aren't displayed. Whenever the resource browser shows it alerts "XML request error: Internal Server Error (500)" and displays no items, although all the things got physically created on the harddisk.

I'm using the Java-Servlet-Connectors - Anyone encountered a similar problem?

Thx for any help.