Hello,
We are trying to set an UDField invisible with UserPreferences (SO 9.1 R2).
According the documentation is the table UDContSmall supported.
Our preference for one checkbox field looks like

and has no effect.
If we try it with Address.ZipCode

it works (not absolutely correct, the field ZipCode is visible in the edit mode, but at least in the read mode it is unvisible).
We tried it with an another UDField of type double, no effect too.
Where are we wrong? Is our syntax for prefkey in case of UDField not correct?
Thanks,
Andrey