Classes not found

[KSK]

Hi,
unfortunately I got a Problem with the RMI-Plugin.

Whenever I try to create or regenerate
the stubs the following errors appear(copied from Eclipse):

RMI Plugin: Additional RMI Errors:error: Class server.controller.VerbindungsController not found.
error: Class client.controller.ClientImpl not found.

RMI Plugin: Errors encountered. More information should be provided. Execution time 1.5 seconds

RMI Plugin: Generated stub file could not be found. See additional messages for details. Catan/client/controller ClientImpl.java

Strange thing about this: the plugin works for my colleagues for the same Project.

Here some details of the configuration of my system:

JDK 1.6.0_01
Eclipse 3.3.1
RMI-Plugin 2.0.6

Thanks for any help