CSS Property in grid

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CSS3

This is my design

<div class="uploader_generic-table">


                <div style="display: block;" id="divGrid">
                    @(Html.Ubs().Grid("grdTemplate")
          .Url(Url.Action("SelectAll", "SaleIn", new { SiteKey = ViewBag.SiteKey })).Showtotal(true)
          .Columns(
                new Column
                {
                    Name = "ID",
                    ClientFormat = ".ID",
                    Header = "<center>No</center>",
                    Sortable = false,
                    PercentWidth = 5
                },
                  new Column
                {
                    Name = "TemplateType",
                    ClientFormat = ".TemplateType",
                    Header = "<center>Type</center>",
                    Sortable = false,
                    PercentWidth = 10
                },
                 new Column
                 {
                     Name = "PartnerName",
                     ClientFormat = ".PartnerName",
                     Header = "<center>Partner Name</center>",
                     Sortable = false,
                     PercentWidth = 10
                 },
                  new Column
                 {
                     Name = "DateRange",
                     ClientFormat = ".DateRange",
                     Header = "<center>Date Period</center>",
                     Sortable = false,
                     PercentWidth = 15
                 },
                 new Column
                 {
                     Name = "TxCount",
                     ClientFormat = ".TxCount",
                     Header = "<center>Rows</center>",
                     Sortable = false,
                     PercentWidth = 6
                 },
                 new Column
                 {
                     Name = "CustMappCount",
                     ClientFormat = ".CustMappCount",
                     Header = "<center>Customer</center>",
                     Sortable = false,
                     PercentWidth = 8
                 },

                 new Column
                 {
                     Name = "ProMappCount",
                     ClientFormat = ".ProMappCount",
                     Header = "<center>Product</center>",
                     Sortable = false,
                     PercentWidth = 8
                 },

                new Column
                {
                    Name = "Country",
                    ClientFormat = ".Country",
                    Header = "<center>Country</center>",
                    Sortable = false,
                    PercentWidth = 8
                },
                                     new Column
                                 {
                                     Name = "CreatedDate",
                                     ClientFormat = "<center>.CreatedDate</center>",
                                     Header = "<center>Uploaded</center>",
                                     Sortable = false,
                                     PercentWidth = 8
                                 },
                                      new Column
                                 {
                                     Name = "UpdatedBy",
                                     ClientFormat = "<center>.UpdatedBy</center>",
                                     Header = "<center>Updated By</center>",
                                     Sortable = false,
                                     PercentWidth = 8
                                 },
                 new Column
                 {
                     Name = "",
                     ClientFormat = "<center>"+StrLinks+"</center>",
                     Header = "<center>Action</center>",
                     Sortable = false,
                     PercentWidth = 11
                 }
            )
            .ShowFooter(true).ShowLoader(true).SingleColumnSort(true).ShowHeader(true)
                         .Groupable(false)
        )
                </div>
            </div>

And CSS Property is below

#admin-new .uploader_generic-table #divGrid th:first-child div:hover
{
    background-position: right -29px;
    cursor: pointer;
}

This Property is working for first child only,now if i want for 3rd column then what should i do??