AXIS, RPC-Style and Element returned

[Kirk]

I've created a simple web service that returns an Element:

public class ReturnElement
{
public Element returnElem()
{
return XMLUtils.StringToElement("urn:foo", "e1", "aaass");
}
}

from the client side I invoke it:

Element ret = (Element) call.invoke( (Object[]) null );

and it raises the following Exception:

- Exception:
org.xml.sax.SAXException: Bad types (interface org.w3c.dom.Element -> class java.lang.String)
at org.apache.axis.message.RPCHandler.onStartChild(RPCHandler.java:285)
at org.apache.axis.encoding.DeserializationContextImpl.startElement(DeserializationContextImpl.java:893)
at org.apache.axis.message.SAX2EventRecorder.replay(SAX2EventRecorder.java:200)
at org.apache.axis.message.MessageElement.publishToHandler(MessageElement.java:684)
at org.apache.axis.message.RPCElement.deserialize(RPCElement.java:241)
at org.apache.axis.message.RPCElement.getParams(RPCElement.java:265)
at org.apache.axis.client.Call.invoke(Call.java:1871)
at org.apache.axis.client.Call.invoke(Call.java:1777)
at org.apache.axis.client.Call.invoke(Call.java:1315)
at SOAPClient.performRequest(SOAPClient.java:40)
at SOAPClient.main(SOAPClient.java:15)
org.xml.sax.SAXException: Bad types (interface org.w3c.dom.Element -> class java.lang.String)


Where is the problem? Thank you!