Problem creating reportviewer in asp.net mvc

I installed the "Install-Package MvcReportViewer" package via the Package Manager Console and trying to create the ReportViewer gives an error of not finding the reference.

My code:

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@using MvcReportViewer; <-- Aqui dá erro

<h2>Invoice</h2>
@using (Html.BeginForm("Index", "RelatorioInvoice", FormMethod.Post))
{ 
    <div>
        <label>
           <span>Invoice/Credit note: </span> 
            @Html.TextBox("Range1", "", new { @class = "form-control form-control-custom", style = "width:100px;" }) 

            <span> até </span>
             @Html.TextBox("Range2", "", new { @class = "form-control form-control-custom", style = "width:100px;" })

            <span>Série: </span> 
            @Html.TextBox("txtSerie", "", new { @class = "form-control form-control-custom", style = "width:50px", maxlength = "2" })

            <span>Tipo: </span> 
            @Html.TextBox("Tipo", "", new { @class = "form-control form-control-custom", style = "width:50px;", maxlength = "2" }) 

            <span>CIA: </span>             
            @Html.DropDownList("ItemsListCIA", null, "Sel...", new { @class = "form-control form-control-custom", style = "width:90px;" })

            <input class="btn btn-padrao-bv" type="submit" id="btnPesquisar" value="Pesquisar"/>
            @Html.ActionLink("Comentário", "Comentario", null , new { target = "_blank", @class="modal-link" })

        </label>
        <p>
            <label>
                @ViewBag.Message
            </label>
        </p>
    </div>

}

<script type="text/javascript">

    $(function () {
        $('body').on('click', '.modal-link', function (e) {
            e.preventDefault();
            $(this).attr('data-target', '#modal-container');
            $(this).attr('data-toggle', 'modal');
        });
        $('body').on('click', '.modal-close-btn', function () {
            $('#modal-container').modal('hide');
        });
        $('#modal-container').on('hidden.bs.modal', function () {
            $(this).removeData('bs.modal');
        });
        $('#CancelModal').on('click', function () {
            return false;
        });
    });

</script>

<div style="margin-top: 20px;">

    @Html.MvcReportViewer(
    "/TestReports/TestReport",
    new { Parameter1 = "Hello World!", Parameter2 = DateTime.Now, Parameter3 = 12345, Parameter4 = DateTime.UtcNow },
    new { Height = 900, Width = 900, style = "border: none" })

    <div id="modal-container" class="modal fade comentario-modal" 
    tabindex="-1" role="dialog">

    </div>
</div>