I bougth Ext Designer one month ago. generated code is the one I usually use buildin ExtJs app. For example, I've set up a store

HTML Code:
 * File: LaboStore.js
 * Date: Mon Apr 19 2010 07:23:17 GMT+0200 (Paris, Madrid (heure d't))
 * This file was generated by Ext Designer version xds-
 * [url]http://www.extjs.com/products/designer/[/url]
 * This file will be auto-generated each and everytime you export.
 * Do NOT hand edit this file.

LaboStore = Ext.extend(Ext.data.JsonStore, {
constructor: function(cfg) {
       cfg = cfg || {};
            LaboStore.superclass.constructor.call(this, Ext.apply({
            storeId: 'MyStore',
	    baseParams: {pDate :'',pHeure:''},	
	    autoLoad: true,
            root: 'data',
            url: 'http://www.mi2l.net/$EJS310/$Labos/data.php',
            fields : [
                name: 'Ligne',
                type: 'string'
        }, cfg));
new LaboStore();
If "autoload" is true, every thing is OK but I want to trigger store loading (changing parameters ...)

I've tried : LaboStore.load({params:{start:0,limit:30,pHeure:'10'}});
but I received the message "LaboStore.load is not a function"

What is the syntax to load a store defined as shown ?

Excuse my english, thank's for your help et congratulation for this beautiful product.