title: Telerik RadGrid: My "delete record" checkbox column is read only. How can I fix this?
body: <p>Here's my grid:</p>
  
  <pre><code>&lt;telerik:RadGrid AutoGenerateColumns="False" ID="grdUsers" DataSourceID="LinqDataSource1" AllowSorting="True" runat="server" GridLines="None" Skin="Office2007"&gt;
      &lt;HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default"&gt;&lt;/HeaderContextMenu&gt;
      &lt;MasterTableView TableLayout="Fixed" DataSourceID="LinqDataSource1"&gt;
          &lt;CommandItemSettings ExportToPdfText="Export to Pdf"&gt;&lt;/CommandItemSettings&gt;
          &lt;RowIndicatorColumn FilterControlAltText="Filter RowIndicator column"&gt;&lt;/RowIndicatorColumn&gt;
          &lt;ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column"&gt;&lt;/ExpandCollapseColumn&gt;
          &lt;Columns&gt;
              &lt;telerik:GridBoundColumn HeaderText="FirstName" DataField="FirstName" ReadOnly="True" SortExpression="FirstName" HeaderStyle-Width="150"&gt;&lt;/telerik:GridBoundColumn&gt;
              &lt;telerik:GridBoundColumn HeaderText="LastName" HeaderStyle-Width="150" DataField="LastName" ReadOnly="True" SortExpression="LastName"&gt;&lt;/telerik:GridBoundColumn&gt;
              &lt;telerik:GridBoundColumn HeaderText="Email" DataField="Email" ReadOnly="True" SortExpression="Email"&gt;&lt;/telerik:GridBoundColumn&gt;
              &lt;telerik:GridCheckBoxColumn HeaderText="Delete?" HeaderStyle-Width="60" ReadOnly="false"&gt;&lt;/telerik:GridCheckBoxColumn&gt;
          &lt;/Columns&gt;
          &lt;EditFormSettings&gt;
              &lt;EditColumn FilterControlAltText="Filter EditCommandColumn column"&gt;&lt;/EditColumn&gt;
          &lt;/EditFormSettings&gt;
      &lt;/MasterTableView&gt;
      &lt;FilterMenu EnableImageSprites="False"&gt;&lt;/FilterMenu&gt;
  &lt;/telerik:RadGrid&gt;
  </code></pre>
  
  <p>As you can see, I have a <code>GridCheckBoxColumn</code> at the end that I would like the users to be able to select a few records and then click another button to delete them. The problem is that the check boxes are all disabled even though I set the <code>ReadOnly</code> property to false.</p>
  
  <p>Any ideas? </p>