Crashplan on Duo/NV+ v2? [SOLVED + TUTORIAL]

Thanks Stephen

I originally set up the NV+ at home before taking it to the office where I want to use it and noticed that the address CP was reporting was the one (192.168.1.124) that the NAS had during setup and not the office address (192.168.1.6). Unfortunately before I realised that this was still showing in the ReadyNAS Dashboard, I uninstalled CP and reinstalled it.

Now however things have moved on a bit.

I can access CP on the NV+ from a PC using PuTTY and the CP GUI on the PC and have it logged in to my account. On the PCs I want to back up to the NV+ the 'button' is green and I can setup a backup but it seems to connect, says synchronising and then immediately get a message 'Destination Unavailable - backup location not available'. I also noted that though the internal and external addresses are correct, the external one doesn't show a port number

The NV+ is setup to save the backup files in /backup/CrashPlanData/ and this folder has Read Write and Execute permissions and I can see the folder and create new sub folders from Windows but it does feel like a permissions issue

I would appreciate any suggestions to get the backups running.

Thanks