Anon.Call Rejection, cannot disable

[DJ_HiP]

I've just come across an issue with a W52P which is rejecting Anonymous calls when the setting is disabled.

I'm on the latest Firmware and I've updated the handset firmware too (Not that the handset should make any difference).

Code:

Firmware Version     25.73.0.40
Hardware Version     25.1.0.0.0.0.0

Something to note, on the handsets if you navigate to Settings you cannot see the 'Anon. Call Rejection' menu entry, so the handsets cannot change the setting either.

Any ideas?