Error: Unknown Property: 'constructor'.

Hi,

i have a problem with flex, hibernate, lcds. I have created a simple grid which is bound with the hibernateassembler to my backend. When i make a simple fill call at the dataservice, i got this error.

Error: Unknown Property: 'constructor'.
at mx.collections::ListCollectionView/http://www.adobe.com/2006/actionscript/flash/proxy::getProperty()
at mx.data.utils::Managed$/normalize()
at mx.data::ConcreteDataService/http://www.adobe.com/2006/flex/mx/internal::normalize()
at mx.data::DataList/http://www.adobe.com/2006/flex/mx/internal::processSequence()
at mx.data::DataList/http://www.adobe.com/2006/flex/mx/internal::processSequenceResult()
at DataListRequestResponder/result()
at mx.rpc::AsyncRequest/acknowledge()
at NetConnectionMessageResponder/resultHandler()
at mx.messaging::MessageResponder/result()


The backend is not the problem, because hibernate logs the select and if i debug my flex application i see that the result will arrive at the client. But how can i solve this problem?

regards

Thorsten