datagrid: using column groups with hidden columns

[eliraz]

Hi,
I'm using a datagrid with column groups and hidden columns and I noticed that something is going wrong.
I've made an example of the bug here:
http://jsfiddle.net/6whkzm47/1/

Thanks in advance

[jarry]

You have made some errors in your code. Please try the updated example http://jsfiddle.net/6whkzm47/2/

[eliraz]

Thank you for the quick response!
but i still think that something doesn't word properly:
http://jsfiddle.net/6whkzm47/3/

I need the columns : Item Id, Product and Unit Cost to be grouped by the "Item Detailssss" header column, so Iv'e made it colspan 3.
But instead, it's grouping by the 3 first shown columns as you can see in the example.

Thanks in advance.

[jarry]

Please try to run this updated example http://jsfiddle.net/6whkzm47/4/