[Mono-list] How to enter 0 and = to DataGrid

[Andrus]

I have Acer notebook with Kubuntu and Windows XP
I ran application containing WinForms DataGrid control in MONO 1.1.17.1

In both operating systems, Datagrid ignores 0 and = key presses. Those
characters are located in the same keyboard key, equal sign is entered using
Shift + keypress.
Other digits from 1 to 9 are working.

How to enter 0 and = characters into Datagrid cell ?

Andrus.