Trouble with JVM 7 - atmosphere chat sample

I'm trying to deploy an app with JVM 7 but I'm having some trouble when I start it.

I'm trying to get the chat sample from atmosphere working but I keep getting errors when I start the app.

I haven't changed anything in the chat sample code. It is also working correctly locally with jetty.

I've deployed using the "--java-version 7" attribute from the console client.

When the application starts, I keep getting class loader errors:

java.io.IOException: Failed to access resource /WEB-INF/lib/logback-classic-0.9.30.jar

Here are some tips from the atmosphere team about deployment on different app servers.

Anyone have any ideas about the problem might be. I assume that it might be associate with the use of  <Loader delegate="false"/> in the context file.

Thanks,

****