jQuery Grid Plugin - jqGrid

Hi!

I'm trying to get a filtertoolbar working with datatype: local, but so far I had no luck.

Here are the options I'm using:

var open_tasks_grid_entries = []; //lots of entries that are useless to copy n paste
var start_height = 500; //dynamically calculated
        jQuery("#open_tasks_grid").jqGrid({
              datatype: "local",
              data: open_tasks_grid_entries,
              colNames: [], //colnames removed for better readability 
              colModel:[
                {name:'id', index:'id', hidden:true, key:true},
                {name:'index_task', index:'index_task', hidden:true},
                {name:'task', index: 'index_task', width: 100},
                {name:'index_project',index:'index_project', hidden:true},
                {name:'project', index: 'index_project', width: 80},
                {name:'index_priority',index:'index_priority', sorttype: "integer", hidden:true},
                {name:'priority', index: 'index_priority', width: 60, align: 'center', fixed: true},
                {name:'index_customer', index: 'index_customer', hidden:true},
                {name:'customer', index: 'index_customer', width: 60},
                {name:'index_agreement', index: 'index_agreement', hidden:true},
                {name:'agreement', index: 'index_agreement', width: 80},
                {name:'manager', index: 'manager', width: 60},
                {name:'index_start', index: 'index_start', sorttype: "integer", hidden: true },
                {name:'start', index: 'index_start', width: 80, align: 'center', fixed: true},
                {name:'index_end', index: 'index_end', sorttype: "integer", hidden: true },
                {name:'end', index: 'index_end', width: 80, align: 'center', fixed: true},
                {name:'index_reported', index: 'index_reported', hidden:true},
                {name:'reported', index: 'index_reported', width: 60, align: 'right'}
             ],
            pager : "#p_open_tasks_grid",
            autoWidth: true,
            height: start_height,
            forceFit: true,
            shrinkToFit: true,
            hoverrows: true,
            loadonce: true,
            altRows: true,
            altclass: 'even',
            caption: "open tasks",
            footerrow: true,
            scroll: 1,
            sortname: 'id',
            viewrecords: true,
            sortorder: "asc"
         });

        jQuery("#open_tasks_grid").jqGrid('footerData', 'set', [""]); //removed for better readability

        jQuery("#open_tasks_grid").jqGrid('filterToolbar',{stringResult: true,searchOnEnter : false}); 

With this, the grid doesn't get populated (instead I see the "Loading" message indefinately). If I remove the sortname: 'id' option, the grid loads fine and I also see the filtertoolbar, but it doesn't do anything when I enter text.

Where did I go wrong?

====

Update: I just saw in Firebug that when I type something in the filtertoolbar, the DOM of the table rows seems to get updated, but it still completely ignores my input, except in the field "manager". The only one that doesn't have a separate index. Does that mean that local filtering only works if you don't have a separate index defined?

I'm using 3.7.1 BTW