Cannot Activate Rsync in Frontview

[bozolino1]

Setup: ReadyNas Ultra 6 Plus with RAIDiator 4.2.22

In my browser i navigate to Services > Standard Protocols > Rsync
I click the Rsync checkbox, press "apply", then the checkbox unchecks itself again

from my mac os x terminal i try to connect to the readynas by using
rsync rsync://192.168.1.101
and get
rsync: failed to connect to 192.168.1.101: Connection refused (61)

frontview log shows no related messages.

what can i do to enable rsync here?

[mdgm-ntgr]

What web browser and version are you using?

Have you tried a different browser?

Does enabling/disabling a different service work?

[bozolino1]

i use safari mac 6.0.3
chrome and firefox don't work either
enabling/disabling other services works