I'm trying to call a remote object that returns a List of String.

After I've invoked the method Flex throws this Error:


ArgumentError: Error #2004: One of the parameters is invalid.

myFault: (mx.messaging.messages::ErrorMessage)#0
  body = (Object)#1
  clientId = (null)
  correlationId = "6D027356-DA87-5CBB-9C7D-F07EFBCDE4F0"
  destination = ""
  extendedData = (null)
  faultCode = "Server.Acknowledge.Failed"
  faultDetail = "Was expecting 
mx.messaging.messages.AcknowledgeMessage, but received null"
  faultString = "Didn't receive an acknowledge message"
  headers = (Object)#2
  messageId = "D11F9A89-1A82-88CD-AF17-F07EFF841B75"
  rootCause = (null)
  timestamp = 0
  timeToLive = 0

I also have this error with a Set class as result...Flex 
documentation said that a Java Collection is converted in an 
ActionScript ArrayCollection...I'm missing something?

-I'm using the JDK5.0, Flex beta3, tomcat 5.5.17
-If I use a Map object as result, it works...

Thanks,
Roberto





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