ReadyNAS NV+ RND4250 - AFP ok, NFS inaccessible

Hi all,

I've had my NAS for many years and have backed up lots of family pics plus various machines onto it over the years.

When I got a new MAC, and then changed ISP (BT to SKY) it was put aside temporarily.

I've now hooked it up to the SKY router via ethernet.

What works - I can use finder to go to the AFP server and can see some old backups.

WHAT DOES NOT WORK - I believe that most of the data is on an NFS share which I used to have to login to.

NFS://IP address does not connect, and gets the message - "There was a problem connecting to the server "ip address". You do not have permission to access this server.  I believe I know the credentials required, but I'm not prompted.

I would be so grateful if somebody could unlock this issue.

Thanks,

Paul