string arrays as input parameters in in doc/literal services

[MKW]

Having now worked out how to send and receive arrays of user-defined 
data types, I am stumped over how to send an array of strings as a 
service call input parameter in a doc-literal/wrapped service.

My wsdl defines the array as following:
<xs:element name="returnMultiple">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" name="hw" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
(Here the element name is actually the method name.)
The method signature is:
public DictEntry[] returnMultiple(String[] hw) throws JAXRPCException;
In my client, I've tried:
call.addParameter("hw", org.apache.axis.encoding.XMLType.SOAP_ARRAY, 
javax.xml.rpc.ParameterMode.IN);

I haven't used reference to serializers or deserializers in the Client - 
do strings need them?  And if they do (as arrays), arrays aren't beans, 
so I'm not sure what to do. Do I need to define an ArrayType in my wsdl? 
And create an ArrayType bean?

My WSDD has the lines:
<operation name="returnMultiple" qname="ns0.returnMultiple" 
xmlns:ns0="http://dct/types"; returnType="rtns:ArrayOf_ns0_DictEntry" 
xmlns:rtns="http://dict/types"; >
<parameter name="hw" type="xsd:ArrayOf_xsd_string" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"/>
</operation>

plus I've tried adding (is this read when there is a ref to a wsdl file?):
<typeMapping
       xmlns:ns="http://dct";
       qname="ns:ArrayOf_xsd_string"
       type="java:string[]"
       serializer="org.apache.axis.encoding.ser.ArraySerializerFactory"
    deserializer="org.apache.axis.encoding.ser.ArrayDeserializerFactory"
       encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
I get a mile of exceptions but basically the message is:
Unable to deploy typemapping: {http://dct}ArrayOf_xsd_string
java.lang.ClassNotFoundException: [Lstring;....
and:
java.lang.ArrayStoreException: [Ljava.lang.String;..
(I don't know what an Lstring is - nor Ljava!)  Help please someone.
Thanks.
Madeleine