[LAD] No sound with JACK over net

Hi all, I'm trying to configure jackd -d net The master machine with the hardware sees my soundcard fine. All looks good as it comes up. I start the slave, which connects to the master machine fine and picks up the right settings such as sample rate. I've tried changing this on the master and they are successfully picked up on the slave so I know this is all talking properly. I also get the 'Connected :-)' message on the master so I'm pretty sure this is all OK. On the slave where I run the application all of the connections appear and look good. However, no matter what I do I never get any sound! I know the card and everything else is OK because if I use the simple alsa 'play' command on the master it comes through loud and clear. I'm using CentOS (headless) on the master which reports jackdmp 1.9.5 On the slave I'm running Mint which reports jackd 0.122.0 These are the standard downloaded packages from the Any ideas? Thank you, Simon