Tree does not load at IE7 using the ext-3.0-rc2

[nick saint]

Hi, I am pretty confused as I cannot get the Tree to load. I had an application and right now I am trying to put it at a desktop style. I have a tree which I cannot get loaded at IE7. The FF and Opera do good job but IE!
I tried to make it as simple as it can be and wrote:

Ext.onReady(function(){

           var testTree = new Ext.tree.TreePanel({
               id: 'testtree',
               border: false,
               rootVisible: false,
               lines: true,
               singleExpand: true,
               loader: new Ext.tree.TreeLoader({
                   dataUrl:'<?=DIR_TO_DESKTOP;?>treeJSON.php'
                   }),
               root: new Ext.tree.AsyncTreeNode()
           });
           testTree .render('tree');
});

Server respond is:

[{
    text: 'To Do',
    cls: 'folder',
    children: [{
        text: 'Go jogging',
        leaf: true,
        checked: false
    },{
        text: 'Take a nap',
        leaf: true,
        checked: false
    },{
        text: 'Climb Everest',
        leaf: true,
        checked: false
    }]
},{
    text: 'Grocery List',
    cls: 'folder',
    children: [{
        text: 'Bananas',
        leaf: true,
        checked: false
    },{
        text: 'Milk',
        leaf: true,
        checked: false
    },{
        text: 'Cereal',
        leaf: true,
        checked: false
    },{
        text: 'Energy foods',
        cls: 'folder',
        children: [{
            text: 'Coffee',
            leaf: true,
            checked: false
        },{
            text: 'Red Bull',
            leaf: true,
            checked: false
        }]
    }]
},{
    text: 'Remodel Project',
    cls: 'folder',
    children: [{
        text: 'Finish the budget',
        leaf: true,
        checked: false
    },{
        text: 'Call contractors',
        leaf: true,
        checked: false
    },{
        text: 'Choose design',
        leaf: true,
        checked: false
    }] 

All I can see at IE is like shown in the picture. Child nodes do not load.
Please, help to get to know what is happening.
Thank you
Nick

[nick saint]

Can somebody help with this case?
Thank you in advance.
Nick

[nick saint]

found this:

Ext.override(Ext.tree.TreeLoader, {
    runCallback: function(cb, scope, args){
        if(Ext.isFunction(cb)){
            cb.apply(scope, args || []);
        }
    }
}); 

It gave the life to a tree.
Thank you
Nick

[Narbz]

Cheers...!!!