Support for Apache Karaf / JBoss Fuse

Hi, I was experimenting with Byteman and Fabric8/JBoss Fuse.

I couldn't have a totally working solution, despite I think I wasn't fare from it:

I have injected the agent, either as a boot time system property or at runtime.
According to debug messages it's been deployed correctly.
Then I have deployed Byteman jar as a wrapped OSGi bundle, so that a proper class loader for that .jar was created and made available to all the other bundles.
As a last thing I have installed a set of simple rules that were probing all the supported methods to print some debug information, but I couldn't read anything.

Shell showed that my rule was triggered:

Rule.execute called for test byteman osgi_6
Rule.execute for decommissioned key test byteman osgi_6

but no output at all.

This is my rule, modified to raise an explicit exception, hoping to find any other effect other than printing a message, but not even the exception was raised:

RULE test byteman osgi
CLASS org.apache.karaf.shell.scr.action.ListAction
METHOD printComponent
AT ENTRY
IF TRUE
DO System.out.println("=============== this is sysout");
	System.err.println("=============== this is syserr");
	debug("============= this uses debug");
	info("============= this uses info");
	traceln("==================== paolo waz here:");
	throw new RuntimeException();
ENDRULE

Is this an OSGi related limit? Am I doing something wrong?