I have a store and FormPanel. I want to send data from formPanel to server:

Code:
     var store_form=null;
     store_form = new Ext.data.Store({                
            url: url_servlet+"kadastr_zemform.jsp",
            reader: new Ext.data.XmlReader({
            totalProperty: "results", 
            record: "contact",
                            fields: [
           ]}),

        });    

    });
    store_form.load();

Panel

Code:
 var podform = new Ext.FormPanel({
        labelAlign: 'left',
        id: 'tab_6',
        frame:true,
        title: 'Договоры подряда',
        bodyStyle:'padding:5px 5px 0',
        width: 600,
        listeners: {
            'activate' :  function(pod_form,records,options) {
            console.log("store:"+store_form);
            this.loaded = true;
            //alert("loaded");
            //console.log(store.getAt(0));
            var record = store_form.getAt(0);
            podform.getForm().loadRecord(record);
            }
        },
                fields[]
     });

    podform.addButton({
        text: 'Submit',
        //disabled:true,
        handler: function(){
        podform.getForm().submit({url:url_servlet+'submit.jsp', waitMsg:'Saving Data...', submitEmptyText: false});
        }
    });
In firebug i see that nofing to send in server. What i doing wrong?
Another question what i gonna do on server side to get this data?