vnc sound not working

[Dogbert]

So If I use the sample client and set:
<param name="enable-audio">true</param>

in user-mappings.xml the sound works over the network. However in my own
app if I set:
guacamoleConfig.setParameter("enable-audio","true")

GuacamoleSocket socket = new ConfiguredGuacamoleSocket(new
InetGuacamoleSocket("localhost", 4822), guacamoleConfig)

        // Return a new tunnel which uses the connected socket
        return new SimpleGuacamoleTunnel(socket)
    }
}

I get no sound over the network. Is there something I'm missing here?
Shouldn't both cases work the same?

Thanks,
Tucker