Types map to SoapPrimitive, not Java type

The complextype below, taken from a .wsdl file produced by MSSOAP toolkit
3.0, is a response structure. In my client ksoap app, I use getProperty on
the returned SoapObject and find that the elements are SoapPrimitive and I
can't cast to the related java types Short, String... I have tried using
Classmap(true) to cover any possible version mismatch though I believe the
client and server are at the same version. 

Also, I'm looking to better understand the use of Classmap - something more
than the api javadoc.

Also, I'm not sure how to handle the base64Binary element.


<complexType  name ='RegInfoResult'>
	<sequence>
		<element name='resultCode' type='short'/>
		<element name='description' type='string'/>
		<element name='encryption' type='base64Binary'/>
		<element name='serverVersion' type='string'/>
		<element name='regURL' type='string'/>
	</sequence>
</complexType>

 Thanks for any help
   steve