Build List for Json Data

[myput]

Hello,

I can get a Json string by my search panel who make a query and send me the good Json string formated.

I would like to display this result in a list.
I have two problems:

First one, how i can give this result to my store ?
I did that but it's don't work:

else {
							Ext.Ajax.request ({
								url: WPApp.config.host + WPApp.config.PhpPath + 'searchModule.php?search=' + query,
								success: function (e) {
									var obj = Ext.util.JSON.decode(e.responseText);
										Ext.getStore(WPApp.stores.ResultPanelListStore).setObj(obj);
										WPApp.views.ResultPanelList.update(obj);
										WPApp.views.ResultPanelList.show();
								}
							});

And the list:

Ext.regModel('WPApp.stores.ResultPanelListModel', {
    fields: [
		{name: 'id', type: 'int'},    
        {name: 'name', type: 'string'},
		{name: 'idCategory', type: 'string'},
	]
});


WPApp.stores.ResultPanelListStore = new Ext.data.JsonStore({
    model  : 'WPApp.stores.ResultPanelListModel',
	setObj: function (id) {
	    this.itemId = id;
		WPApp.stores.DirectoryItemListListStore.load({data:this.itemId});
	}
});


WPApp.views.ResultPanelList = new Ext.List ({
	fullscreen: true,
	itemTpl : '{name}',
	store: WPApp.stores.ResultPanelListStore
});

I have only one results, and i sould have 2 results in my list. If i give an alert in the store, i get 2 results that's good but only one is displayed.

After, another problem, the list is displayed only 1 times on 3 of 4 request.
I don't know why ...

Can you help me?

Thanks

[myput]

i'm sorry, post resolved ....

[myput]

Nop, i have another problem:

I fact, i have my list, it's good, but i can't get record for the itemtap:

WPApp.stores.ResultPanelListStore = new Ext.data.JsonStore({
    model  : 'WPApp.models.SearchDirectoryListPanelModel',
	setObj: function (JsonObj) {
	    this.JsonObj = JsonObj;
		WPApp.stores.DirectoryItemListListStore.load({data:this.JsonObj});
	}
});


WPApp.views.ResultPanelList = Ext.extend(Ext.List,{
	fullscreen: true,
	itemTpl : '{name}',
	store: WPApp.stores.ResultPanelListStore,
	listeners: {
		itemtap: function(view, index) {
			var record = WPApp.stores.ResultPanelListStore.getAt(index);
		}
	}
});

Have you an idea?

[myput]

Var record send me Undefinied variable ... Don't know why because all list i did, i did like that ...

Have you an idea how to resolve that ?

Thanks for help