ReadyNAS duo not visible to Time Machine

Hi there. One step forward, two steps back!

So, I have managed to make the ReadyNAS appear as a backup disk location on my iMac at last :- viewtopic.php?f=71&t=49063&p=339907#p339907

This is fine, however the user 'ReadyNAS' (i.e.. the user setup in the NAS Timemachine tab), does not have access to see SHARES, despite me allowing GUEST access to them.

So I'm now in this bizarre situation where I have to make two connections to the RadyNAS from my iMac as follows:-

1)
* Mac FINDER : GO > CONNECT TO SERVER > SERVER ADDRESS > afp://192.168.1.100/ReadyNAS
* Login Prompt > Username = ReadyNAS / Password = as set on Frontview (under TimeMachine settings)
* Mac FINDER then shows the ReadyNAS as a connected DEVICE but no directories/shares display when I click on the ReadyNAS item
* Mac SYSTEM PREFERENCES > TIME MACHINE > ReadyNAS (192.168.1.100) displays as a Backup disk location

Disconnect from the ReadyNAS (via Mac FINDER).

2)
FINDER > GO > NETWORK and I see an item called ''readynas'' (note all in lowercase).
Click on this item and I see 3 x Shares (BACKUP, DOWNLOADS, MEDIA)
''Connected As'' reads ''Guest''

Flick back to Mac SYSTEM PREFERENCES > TIME MACHINE > ''ReadyNAS-1'' (192.168.1.100) greyed out as a backup destination.

I feel like I'm chasing my tail here. Surely things shouldn't be this difficult?

I was hoping to remain connected to the NAS as user ReadyNAS (so that TimeMAchine backup could take place) AND also see the Shares & Files on the NAS.

Appreciate your help.

D