XMLBeans namespace problem

[alan_sec]

Hi,
I have a problem using namespace while validating parsed xml document
with XMLBeans.
My xml document look something like this:
<root>
<data>
...
</data>
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
</Signature>
</root>.
When I triy to validate it I get error:

XmlValidationError.getMessage() ->
Expected element 'Signature' instead of
'Signature@http://www.w3.org/2000/09/xmldsig#' here in element Message
XmlValidationError.getErrorType() ==
XmlValidationError.INCORRECT_ELEMENT

When I set xmlns to empty string (<Signature xmlns="">) everything
works fine.
What is the problem?
Do I have to set namespace aware or somethin like that? -> I am new
with this.
Thanks,
Alan