My Fault sorry 
Code:
this.getMyTabPanel().add({
closable: true,
xtype: "MyProduct",
id: 'myproduct' + record.raw.id,
title: record.raw.shopTitle + ' - Produkte'
}).show();
Ext.getCmp('myproduct' + record.raw.id).reconfigure(Ext.create('MyApp.store.MyProductStore'));
Ext.getCmp('myproduct' + record.raw.id).store.proxy.extraParams.shopId = record.raw.shop;
Ext.getCmp('myproduct' + record.raw.id).store.load();
Ext.getCmp('myproduct' + record.raw.id).filters.bindStore(Ext.getCmp('myproduct' + record.raw.id).store);
Ext.getCmp('myproduct' + record.raw.id).dockedItems.items[1].bindStore(Ext.getCmp('myproduct' + record.raw.id).store);
I must bind the store. because i reconfigure it.