jQuery Grid Plugin - jqGrid

Hi

Situation:
I have a grid containing dynamic rows & colls filled with checkboxes.

Purpose is to save changes made to those checkboxes.

Problem:

When clicking a checkbox, the edit mode isn't triggered and therefore no change has been made.
I have to click on a cell to do this.

Click on cell marks cell changed and value has changed.

During my search on the forum I found following topics:
http://www.trirand.com/blog/?p.....p;search=1
http://www.trirand.com/blog/?p.....-jqgrid-36

Neighter of them could provide me a solution.

Source (limited):

$("#grid").jqGrid(
 {
 url: '.../GridData',
 datatype: 'json',
 colModel:
[{name:'field1',index:'field1',sortable:false,width:25,align:'center',
      formatter:'checkbox',formatoptions:{disabled:false},
      editable:true,edittype:'checkbox',editoptions:{value:'true:false'},search:false},
{name:'field2',index:'field2',sortable:false,width:25,align:'center',
      formatter:'checkbox',formatoptions:{disabled:false},
      editable:true,edittype:'checkbox',editoptions:{value:'true:false'},search:false}]
 multiselect: true,
 multiboxonly: true,
 cellEdit: true,
 cellsubmit: 'clientArray',
 mtype: "POST",
 pager: $('#gridPager'),
 rowNum: 20,
 rowList: [10, 20, 30, 50, 100],
 caption: 'caption',
 toolbar: [true, "top"],
 height: '100%'
 });
Thanks in advance
Brecht