ReadyCLOUD for 4.2.x

I have a ReadyNAS DUO running 4.3.8. Is this device supported with the ReadyCLOUD feature? I have the device connected to the router and stream iTunes from it on my home network. I want to extend the function, so I can access when I am not at home. I have tried to set-up the device, but the site (below) does not 'discover' my device. I have also used RAIDar to install the ReadyNAS Remote add on. Still no luck. Advice?

https://readycloud.netgear.com/client/index.html