ReadyNAS 102 and BT Business Hub 5

Hi everyone

I moved to BT Business on Monday. I connected my ReadyNAS 102 to it and I can access it ok on my mac via finder and explorer on my windows 10 PC.

The problem I'm having is when I access over the net via readycloud.neatgear.com. The device is showing as offline.

I disabled the firewall on the BT Business Hub 5 but it still showed as offline.

I can log on as admin ok when I connect via IP address directly.

Can any one tell me what I need to do?

Many thanks in advance.