Thousand separator in RadGrid view mode

[sebastian]

I have column with values for example 7566503,51 and I want use thousand separator like 7 566 503,51 in view mode.

This is *.aspx code:

<telerik:GridNumericColumn DataField="G17 - WYKONANIE MC3" 
                    DataType="System.Decimal" DecimalDigits="2" DataFormatString="{0:N}"
                    FilterControlAltText="Filter G17 - WYKONANIE MC3 column" 
                    HeaderText="WYKONANIE MC3" SortExpression="G17 - WYKONANIE MC3" 
                    UniqueName="G17 - WYKONANIE MC3">
                </telerik:GridNumericColumn>

I set DataFormatString {0:N} and {0:# ### ###,##} and {0:#.###.###,##}, but doesn't work. Have anyone some idea to resolve my problem??