Hi all,
I have written a service.Now when I am generating the
WSDL file from the browser I am getting this error:

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

Can anybody please help me out?Following are my WSDD file
i am using to deploy my service.

qname="ns1:DataHandler"
languageSpecificType="java:javax.activation.DataHandler"
serializer="org.apache.axis.encoding.ser.JAFDataHandlerSerializerFactory"
deserializer="org.apache.axis.encoding.ser.JAFDataHandlerDeserializerFactory"
encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
/>