Editable Checkcolumn gives javascript error

[Birgit]

When using an editable checkcolumn in a gridpanel, i receive the following javascript error:
"Microsoft JScript runtime error: 'undefined' is null or not an object"

this happens when i click on the cell and i enabled the javascript debugging in IE.

                if (hook.canThrow) {
                    try {
                        out = style[camel];
                    } catch (e) {
                        out = '';
                    }
                } else {
                    out = style[camel];
                }

The bold and underlying part throws the error.

[Vladimir]

Please use Editable property for CheckColumn instead Editor

[Birgit]

I use the editable property:

<ext:ModelField Name="dataindex" Type="Boolean" />
<ext:CheckColumn DataIndex="dataindex" Header="Header" runat="server" Editable="true" />