XmlMassUpdate - Replace Value Node - msbuild

Question

I'm trying to use XmlMassUpdate to update my config files based on build Version type. There seems to be no documentation on how to update the new app.config (vs2008) settings formats anywhere.
This is the config section:
<applicationSettings>
<CTC.Mica.ClientService.Properties.Settings>
<setting name="PipeName" serializeAs="String">
<value>\\.\pipe\micaPipe</value>
</setting>
<setting name="CTC_Mica_ClientService_MicaWebService_MicaWebService"
serializeAs="String">
<value>URL</value>
</setting>
</CTC.Mica.ClientService.Properties.Settings>
</applicationSettings>
And i am trying to update the URL value from this file:
<Debug>
<setting xmu:key="name" name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="String">
<value>DEVURL</value>
</setting>
</Debug>
<Test>
<setting xmu:key="name" name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="String">
<value>TESTURL</value>
</setting>
</Test>
<Release>
<setting xmu:key="name" name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="String">
<value>LIVEURL</value>
</setting>
</Release>
Running the script, i can replace either the "name" or the "serializeAs" attributes, but not the value node.
How would i go about replacing the value node?
Regards
Tris

Answer 1

The following scripts work fine for me (running on 1.3.0.471 which might be a nightly build):
build.proj
<Project DefaultTargets="Run" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\MSBuildCommunityTasks\MSBuild.Community.Tasks.targets" />
<Target Name="Run">
<Delete Condition="Exists('output.xml')" Files="output.xml"/>
<XmlMassUpdate
ContentFile="input.xml"
ContentRoot="/test"
SubstitutionsFile="subs.xml"
SubstitutionsRoot="/substitutions/release"
MergedFile="output.xml"
/>
</Target>
</Project>
input.xml
<test>
<setting name="PipeName" serializeAs="String">
<value>\\.\pipe\micaPipe</value>
</setting>
<setting name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="String">
<value>URL</value>
</setting>
</test>
subs.xml
<substitutions xmlns:xmu="urn:msbuildcommunitytasks-xmlmassupdate">
<release>
<setting xmu:key="name" name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="Testing">
<value>LIVEURL</value>
</setting>
</release>
</substitutions>
output.xml (generated by build)
<test>
<setting name="PipeName" serializeAs="String">
<value>\\.\pipe\micaPipe</value>
</setting>
<setting name="CTC_Mica_ClientService_MicaWebService_MicaWebService" serializeAs="Testing">
<value>LIVEURL</value>
</setting>
</test>