Installation bricht ab "server could not be registered"

[gitl]

Hi,
ich hab nach Dieser Anleitung versucht Open-Xchange(6.20) auf debian 6.0 zu installiern. leider bricht es immer mit

server could not be registered:
...
java.net.SocketTimeoutException: Read timed out

ab.

ich habs auch schon mit der normalen installtion nach dieser Anleitung versucht. Leider auch ohne erfolg bricht an der gleichen Fehlermeldung ab.

Hoffe jemand kann mir weiterhelfen.

Mfg

GitL

Setting up open-xchange-unifiedinbox (6.20.2.0-2) ...
Setting up open-xchange-usm (6.20.2.0-2) ...
Configuring compatible JVM...
Adding database user 'openexchange' to MySQL...
Creating filestore at '/var/opt/filestore/'...
Creating 'configdb'...
Creating basic configuration...
Applying additional configuration
Starting admin service...
Sleeping 10 seconds...
Registering groupware system at the database...
server could not be registered:
Server response:
 error during JRMP connection establishment; nested exception is:
        java.net.SocketTimeoutException: Read timed out
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:286)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
        at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:322)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:84)
        at com.openexchange.admin.console.util.server.RegisterServer.<init>(RegisterServer.java:78)
        at com.openexchange.admin.console.util.server.RegisterServer.main(RegisterServer.java:92)

Server cannot be registered, aborting.

java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)