ClassCastException error

In the flex app (without BlazeDS), I send an arrayCollect开发者_运维百科ion to Java using a webservice.

And I get this error:

ClassCastException: com.sum.org.apache.xerces.internal.do.ElementNSImp l cannot be cast to MyValueObject

How can I retrive the properties from ElementNSImpl?

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The error is given when, from flex, I send and arraycollection type MyValueObject, through a webservice, so on Java I have the VO of the same type, and with the same properties (all strings), I receive it as ArrayList and I try to cast.

Then I obtain the class cast exception. I don't know how to retrieve the objects from the arraylist and I don't know why it was converted into an ElementNSImp object.