[thredds] how get ncISO working in TDS 4.2.8?

Hi All,
I just upgraded to the recent TDS 4.2.8 release and cannot get ncISO
working. Unlike before, it appears that I no longer need to manually install
the threddsIso*.jar file, the metadata-servlet.xml file, and update the
web.xml file myself as described at http://www.ngdc.noaa.gov/eds/tds/ since
these things are already in place when I downloaded and installed the TDS
4.2.8 thredds.war file. However, there seems to be some extra thing I need
to do in order to enable it? When I go to my ISO services, I get the
following error:

HTTP Status 403: ISO service not supported. Access to the specified resource
(ISO service not supported) has been forbidden.

And here's what appears in threddsServlet.log:

2011-08-02T13:25:38.531 -1000 [    311007][      14] ERROR -
thredds.server.metadata.controller.AbstractMetadataController - NullPointer
- getTDSMetadata failed:
java.lang.NullPointerException
        at
thredds.server.metadata.controller.AbstractMetadataController.getThreddsDataset(AbstractMetadataController.java:83)
        at
thredds.server.metadata.controller.IsoController.handleMetadataRequest(IsoController.java:105)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:413)
        at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:134)
        at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:310)
        at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:297)
        at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
        at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
        at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
        at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
thredds.servlet.filter.RequestQueryFilter.doFilter(RequestQueryFilter.java:122)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
thredds.server.RequestBracketingLogMessageFilter.doFilter(RequestBracketingLogMessageFilter.java:53)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
thredds.servlet.filter.RequestPathFilter.doFilter(RequestPathFilter.java:105)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)
2011-08-02T13:25:38.837 -1000 [    311313][      14] INFO  -
thredds.server.RequestBracketingLogMessageFilter - Request Completed - 403 -
-1 - 309

Thanks,
John Maurer
Pacific Islands Ocean Observing System (PacIOOS)
University of Hawaii at Manoa

P.S. For testing, you can try any of our catalog pages at
http://oos.soest.hawaii.edu/thredds/
**