Gallio publishing fails because a class is not found at deserialization time: hudson.plugins.gallio.GallioType.

Here's the traceback from the console output:

[xUnit] Starting to record.
ERROR: Publisher com.thalesgroup.hudson.plugins.xunit.XUnitPublisher aborted due to exception
hudson.util.IOException2: The plugin hasn't been performed correctly.
at com.thalesgroup.hudson.plugins.xunit.XUnitPublisher.perform(XUnitPublisher.java:126)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:582)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:563)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:550)
at hudson.model.Build$RunnerImpl.post2(Build.java:152)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:528)
at hudson.model.Run.run(Run.java:1267)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)
Caused by: hudson.util.IOException2: remote file operation failed: e:\hudson\workspace\SdlStudio2009 at hudson.remoting.Channel@1f517997:build-soft-o12
at hudson.FilePath.act(FilePath.java:743)
at hudson.FilePath.act(FilePath.java:729)
at com.thalesgroup.hudson.plugins.xunit.XUnitPublisher.perform(XUnitPublisher.java:99)
... 10 more
Caused by: java.io.IOException: Remote call on build-soft-o12 failed
at hudson.remoting.Channel.call(Channel.java:556)
at hudson.FilePath.act(FilePath.java:736)
... 12 more
Caused by: java.lang.ClassNotFoundException: Failed to deserialize the Callable object. Perhaps you needed to implement DelegatingCallable?
at hudson.remoting.UserRequest.perform(UserRequest.java:90)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:58)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: hudson.plugins.gallio.GallioType
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.io.ObjectInputStream.resolveClass(Unknown Source)
at hudson.remoting.ObjectInputStreamEx.resolveClass(ObjectInputStreamEx.java:50)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readArray(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:168)
at hudson.remoting.UserRequest.perform(UserRequest.java:88)

Regards,
Régis