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Kendo UI - Nested ClientTemplates not working

===================================================
#= firstName# (Bind main Grid)
===================================================
\\#=Media\\# (Bind data in Sub-grid)
===================================================

@(Html.Kendo().Grid<DbModels.Test>()
                                            .Name("grdTest")
                                            .Columns(columns =>
                                            {
                                                columns.Template(e => { }).ClientTemplate("<img src='/images/icon-1.png' />").Width(50).Title("");
                                                columns.Template(e => { }).ClientTemplate("<table><tr><td class='name k-hierarchy-cell'><a class='k-plus' href='javascript:void(0);'>#= firstName#</a></td></tr><tr><td><div class='m-b5'>DOB: 07/03/13<br></div>Entry: 07/03/13</td></tr></table>").Width(200).Title("");
                                                columns.Template(e => { }).ClientTemplate("<div class='m-b5'>Test ID: <span class='blue-light'>781923</span><br></div>Call-In ID: <span class='blue-light'>5439</span>").Title("");
                                                columns.Template(e => { }).ClientTemplate("<div class='m-b5'>Last Test:<br></div><span class='blue-light'>781923</span>").Title("");
                                            })
                                            .ClientDetailTemplateId("template")
                                            .DataSource(dataSource => dataSource
                                            .Ajax()
                                            .Read(read => read.Action("GetTestData", "CaseManager"))
                                            )
                                        )

                                        <script id="template" type="text/kendo-tmpl">
                                            <div class="sub-table">
                                                @(Html.Kendo().Grid<DbModels.Referral>()
                                                    .Name("grdReferral_#=id#")
                                                    .Columns(columns =>
                                                    {
                                                        columns.Template(e => { }).ClientTemplate("<span class='text14'>TACO1xW</span><span class='pass'>Pass</span>").Title("");
                                                        columns.Template(e => { }).ClientTemplate("<span class='active-txt'>Active<br></span>\\#=kendo.toString(StartDate, 'dd/MM/yyyy')\\# - \\#=kendo.toString(EndDate, 'dd/MM/yyyy')\\#").Title("");
                                                        columns.Template(e => { }).ClientTemplate("THC/PCP/ECS<br>SPI/COC/HER<span class='media'>Media: \\#=Media\\#</span>").Title("");
                                                        columns.Template(e => { }).ClientTemplate("<a href=''><img src='/images/edit-icon.png' border='0' alt='Edit'></a>").Title("");
                                                        columns.Template(e => { }).ClientTemplate("<a href=''><img src='/images/calendar-icon.png' border='0' alt='Calendar'></a>").Title("");
                                                    })
                                                    .DataSource(dataSource => dataSource
                                                        .Ajax().ServerOperation(true)
                                                        .Read(read => read.Action("GetTestReferralData", "CaseManager", new { TestId = "#= id#" }))
                                                    )
                                                    .ToClientTemplate()
                                                )
                                            </div>
                                        </script>

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