RedisBroadcaster won't serialize messages

[futuretec]

Hey there,

I'm trying to use Atmosphere with the RedisBroadcaster within a GWT 2.7 project.
Unfortunately all server-side sent messages won't be serialized with the specified classes (neither ManagedRPC nor Jersey).

The method "outgoingBroadcast(Object message)" of "RedisUtil" recieves an un-serialized Message (which simply will be converted via toString() .. not very helpful here)

Maybe I'm just setting the wrong configurations?
I'm using the ManagedService annotation with following settings:
interceptors = {
AtmosphereResourceLifecycleInterceptor.class,
TrackMessageSizeInterceptor.class,
GwtRpcInterceptor.class,
SuspendTrackerInterceptor.class,
AtmosphereMessageInterceptor.class,
IdleResourceInterceptor.class
}
broadcastFilters = {
AtmosphereMessageFilterEncoder.class
}

Is there any possibility to use Serialization with a RedisBroadcaster?

Thanks for any suggestions.