Pagesize doesn't work in grid when I use wmscapabilitiesstore as store

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ExtJS

geolocation

geoserver

(ExtJS 3.2.1)I need your help. I'm trying to create a grid.I use GeoExt.data.WMSCapabilitiesStore as a store.

var grid = new Ext.grid.GridPanel({
    title: "WMS Capabilities",
    store: wmsStore,
    cm: new Ext.grid.ColumnModel([
        {header: "Name", dataIndex: "name", sortable: true},
        {id: "title", header: "Title", dataIndex: "title", sortable: true}
    ]),
    sm: new Ext.grid.RowSelectionModel({singleSelect:true}),
     width:774,
    height:429,
       bbar: new Ext.PagingToolbar({
        pageSize: 10,
        store: wmsStore,
        displayInfo: true


    })
    });

When I create a bbar, the problem appears. PageSize doesn't work. Grid have all items of store instead of 10.

var wmsStore = new GeoExt.data.WMSCapabilitiesStore({
    id: 'external_wms_store',
    url: OpenLayers.ProxyHost +            'http://demo.lizardtech.com/lizardtech/iserv/ows?SERVICE=WMS&REQUEST=GetCapabilities',
    autoLoad: {params:{start: 0, limit: 10}}

});

Server returns all layers from server, although I use paramNames. I want to change a grid for it shows layers checked by me instead of load this layers from server. Which functions can help me for this? I have a little experience in extjs.

What I have tried:

I tried to use autoLoad and Load in store and grid with params. or paramNames, but it can't help me.