Kendo ui 剑道格网不聚合

我正在使用Kendo UI Complete v2013.2.918，试图显示一个网格，其中包含与一个组列相关的多个列的聚合，聚合只是对最新的行求和，我遵循Kendo页面上的示例，它看起来相同，但没有求和。你知道是什么问题吗

这是我的代码：

detailGrid = $("#details_paginated_grid_table").kendoGrid({

columns: [
    { field: "CallDate", title: translate('DATE') },
    { field: "CallTime", title: translate('TIME') },
    { field: "From", title: translate('FROM') },
    { field: "Destination", title: translate('DESTINATION') },
    { field: "MaskedCalledNumber", title: translate('DIALNUMBER') },
    { field: "CallType", title: translate('CALLTYPE'), groupHeaderTemplate: "Name: #= value # total Call Type: #=count#" },
    { field: "CallDurationDisplay", title: translate('MINUTES'), footerTemplate: "Total: #=sum#", groupFooterTemplate: "Minutes: #=sum#", aggregates: ["sum"] },
    { field: "CallRateDisplay", title: translate('RATE'), footerTemplate: "Total: #=sum#", groupFooterTemplate: "Rate: #=sum#", aggregates: ["sum"] },
    { field: "LongDistanceChargeDisplay", title: translate('LD'), footerTemplate: "Total: #=sum#", groupFooterTemplate: "LD: #=sum#", aggregates: ["sum"] },
    { field: "PktDtVolDisplay", title: translate('DATA'), footerTemplate: "Total: #=sum#", groupFooterTemplate: "Data: #=sum#", aggregates: ["sum"] },
    { field: "TotalChargesDisplay", title: translate('TOTAL'), footerTemplate: "Total: #=sum#", groupFooterTemplate: "Charges: #=sum#", aggregates: ["sum"] }                                                
],

dataSource: {
    data: [],

    group: {
        field: "CallType",
        aggregates: [
            { field: "CallDurationDisplay", aggregate: "sum" },
            { field: "CallRateDisplay", aggregate: "sum" },
            { field: "LongDistanceChargeDisplay", aggregate: "sum" },
            { field: "PktDtVolDisplay", aggregate: "sum" },
            { field: "TotalChargesDisplay", aggregate: "sum" },
            { field: "CallType", aggregate: "count" }
        ]
    },

    aggregate: [
        { field: "CallDurationDisplay", aggregate: "sum" },
        { field: "CallRateDisplay", aggregate: "sum" },
        { field: "LongDistanceChargeDisplay", aggregate: "sum" },
        { field: "PktDtVolDisplay", aggregate: "sum" },
        { field: "TotalChargesDisplay", aggregate: "sum" }
    ]
},
//sortable: false,
scrollable: false,
//pageable: false,
groupable: true,
height: 300,

}))

以下是有关聚合的屏幕截图：

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我将剑道版本更改为2014.3.1411，并具有相同的效果。最后，我发现了问题，视图模型中的列被格式化为字符串：（，我更改了数据类型并立即生效我将剑道版本更改为2014.3.1411，并具有相同的效果最终我发现了问题，视图模型中的列被格式化为字符串：（，我更改了数据类型并立即生效。）