Are you running it in a full Java EE glassfish server, since web services is not required part of ejb lite.
How do you package spring jars, or make them available to your app? Any warning/errors in server.log while deploying or running your app?
You may want to try a non-spring ejb 3.1 interceptor class, and compare it to a spring interceptor. I'm pretty sure the general interceptor works in ejb lite.
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