Type '$Proxy86' was not included in the set of types which can be serialized by this SerializationPolicy

Hey guys, 

have you ever get an error like this?

All my types are Serializables, default constructor, etc... like always.

I dont know that is this '$Proxy86' that is shown in the error

thanks for your help

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/cFId9SUT-1AJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.