The Union Platform (tm)

Hi,
my server is running local with the ip 192.168.178.x and I got all examples working except the ones which uses the server side modules like the fridgemagnet example.
I dont know exacly where to put the FridgeMagnetsRoomModule.java. I guess it must be somewhere near the union server...
Flash gives out this:

6/9/10 15:33:42.169 UTC+2 INFO: [ROOM_MANAGER] Room creation result for room [fridgemagnets]: ERROR
6/9/10 15:33:42.172 UTC+2 INFO: [ROOM id: fridgemagnets] Dereferencing resources.
6/9/10 15:33:42.174 UTC+2 INFO: [ROOM id: fridgemagnets] Shutdown complete.
6/9/10 15:33:42.175 UTC+2 INFO: [ROOM_MANAGER] Join result for room [fridgemagnets]: ROOM_NOT_FOUND

I also set up the union.xml with the module like this.
<module>
<id>FridgeMagnetsRoomModule</id>
<source type="class">FridgeMagnetsRoomModule</source>
</module>

Any help? Thanks in advance.