Why is GridClientSelectColumn disabled by default and how can i iterate through them and set all of them to enabled?

I have a Gridclientselectcolumn that i want to be multi row selected ( Yes i have allow multi row selected set to true). The problem is that all the checkboxes appear disabled when the grid receives data, even though i'm not assigning them any enabled or disabled attribute (GridClientSelectColumn doesn't even have that property). What can i do so the checkboxes will appear enabled?

...
     <telerik:GridClientSelectColumn UniqueName="Remover" HeaderText="Remover" > </telerik:GridClientSelectColumn>
                                        </Columns>

                                    </MasterTableView>
                                     <ClientSettings EnableRowHoverStyle="true"> 
                                        <Selecting AllowRowSelect="true"
                                            EnableDragToSelectRows="true"></Selecting> 
                                         </ClientSettings> ...

Thank you in advance