Lion + Readynas Duo (beta) + Time Machine = FAIL??

I have just bought the Readynas recently and am now kicking myself for listening to the idiot at Novatech sales who told me there were no problems using it with a macbook and running os lion :evil: I am having the same issues as you all. The mac either doesn't find the drive, or if it does it, it wont back up. I have downloaded the beta firmware as suggested but this has made no difference whatsoever. If i go into the nas firmware and disable the time machine from the backup selection and then re enable it, hey presto, the drive is suddenly found but once the time machine is commenced it either goes back to saying it cannot find the drive or occasionally back up will start as it did tonight i got a whole 11gb before it crashed and said it cannot find the drive again. I am now wondering whether to take the drives back and get a refund, considering all the hours I have lost trying to get this thing to work I might as well have splashed out the extra and bought Apple time capsule! :cry: