Newbie question re attachments sample WSDL

[p2...@garethwestern.com]

Hi,
I've seen this question posted a few times, but I don't recall seeing an
answer... does anyone know why, when one tries to view the echoattachment
sample wsdl, provided with Axis, the following error is returned:

Fault - ; nested exception is: 
WSDLException: faultCode=OTHER_ERROR: Can't find prefix for
'urn:EchoAttachmentsService'. Namespace prefixes must be set on the Definition
object using the addNamespace(...) method.: 


AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode: 
 faultString: WSDLException: faultCode=OTHER_ERROR: Can't find prefix for
'urn:EchoAttachmentsService'. Namespace prefixes must be set on the Definition
object using the addNamespace(...) method.: 
 faultActor: 
 faultNode: 
 faultDetail: 

Thanks for your time :)