ReadyNAS not accepting sftp connections

[ArchPrime]

I have a fixed IP address from my Internet Service Provider and on my router have port 22 fowarded to my ReadyNAS local network IP.  I have confirmed the ports is open via https://www.yougetsignal.com/tools/open-ports/

ReadyNAS has SSH and FTP enabled for administrator account

fFTP connection is working fine 

SSH has keyfile pair generated by Puttygen, as well as passphrase

However with FileZilla, I cannot establish an SFTP connection to ReadyNAS at that fixed IP, on port 22, 

FileZilla reports 'Fatal: unable to initialise SFTP on server: could not connect
Error: Could not connect to server'

How do I progress from here?

On the basis that it is more secure and supposedly slightly faster than FTP, I am keen to get SFTP working, to allow for automated weekly backups of a website.

Any help much appreciated?

[ArchPrime · Accepted solution]

In answer to my own question - ensure Rsync Only setting is NOT ticked under admin account details for SSH - now appears to be working fine

[ArchPrime · Accepted solution]

In answer to my own question - ensure Rsync Only setting is NOT ticked under admin account details for SSH - now appears to be working fine