Flash Builder 4.5 + SPring 3.0.5 + Spring BlazeDS Integration 1.5.0.M2 + blazeDS 4 funciona?

Pessoal alguem sabe se essa combinação funciona?? não achei nada falando que não, porem nao consigo fazer funcionar, so recebo o seguinte erro:

[RPC Fault faultString=“Send failed” faultCode=“Client.Error.MessageSend” faultDetail=“Channel.Connect.Failed error NetConnection.Call.Failed: HTTP: Failed: url: ‘http://localhost:8080/WebContent/messagebroker/amf’”]
at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::faultHandler()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\rpc\AbstractInvoker.as:345]
at mx.rpc::Responder/fault()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\rpc\Responder.as:68]
at mx.rpc::AsyncRequest/fault()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\rpc\AsyncRequest.as:113]
at mx.messaging::ChannelSet/faultPendingSends()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\messaging\ChannelSet.as:1619]
at mx.messaging::ChannelSet/channelFaultHandler()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\messaging\ChannelSet.as:1209]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.messaging::Channel/connectFailed()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\messaging\Channel.as:1117]
at mx.messaging.channels::PollingChannel/connectFailed()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\messaging\channels\PollingChannel.as:435]
at mx.messaging.channels::AMFChannel/statusHandler()[E:\dev\hero_private\frameworks\projects\rpc\src\mx\messaging\channels\AMFChannel.as:453]

porem ja configurei igualzinho a como utilizo no flex 3.

tks