Hi every one I have the problem with the code when I press forward and back then the code works, but when I press one of the numbers nothing happens. how can it be ?

i dont now if you want to se the entire code on the page but here it is.

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage<ContentModels.Blog>
@using ContentModels = Umbraco.Web.PublishedContentModels;
@using System.Globalization;
    @{
    Layout = "master.cshtml";



    var selection = Model.Content.Site().FirstChild("blog").Children().Where(x => x.IsVisible()).OrderBy("CreateDate desc");


}
        <!-- Main Content -->
        @{
            int pageSize = 1; // How many items per page
            int page; // The page we are viewing
                      /* Set up parameters */
            if (!int.TryParse(Request.QueryString["page"], out page))
            {
                page = 1;
            }
            /* This is your basic query to select the nodes you want */
            //var nodes = Model.Content.Children.Where(x => x.DocumentTypeAlias == "nyBegivenhed").OrderBy("CreateDate desc");
            int totalNodes = selection.Count();
            int totalPages = (int)Math.Ceiling((double)totalNodes / (double)pageSize);
            /* Bounds checking */
            if (page > totalPages)
            {
                page = totalPages;
            }
            else if (page < 1)
            {
                page = 1;
            }
        <div class="container">
            <div class="row">
                <div class="col-lg-8 col-md-10 mx-auto">
                    <h1 class="main-page-heading">@Model.Content.Name</h1>
                    @foreach (var item in selection.Skip((page - 1) * pageSize).Take(pageSize))
                    {
                    <div class="post-preview">
                        <h2 class="post-title">@item.Name</h2><p class="post-meta">Skrevet af:&nbsp;@item.CreatorName &nbsp;d.&nbsp;@item.CreateDate.ToString("dd. MMMM yyyy", new CultureInfo("da-dk"))</p>
                        <p id="text-transform-teaser">@Umbraco.TruncateByWords(Html.GetGridHtml(item, "skrivArtikelBodyText").ToString(), 20)</p>
                        <a href="@item.Url" class="btn btn-danger btn-pagination">Læs mere</a>
                    </div>
                    <hr />
                    }
                    @{
                    if (totalPages > 1)
                    {
                    <div class="pagination-class">
                        <ul class="pagination">
                            @if (page > 1)
                            {
                            <li><a style="margin-right: 10px;" class="btn btn-danger btn-pagination" href="?page=@(page-1)">Tilbage</a></li>
                            }
                            @for (int p = 1; p < totalPages + 1; p++)
                            {
                            <li style="margin-right: 10px;" class="@(p == page ? " active" : string.Empty) btn btn-danger btn-pagination">
                                <a href="?page=@p">@p</a>
                            </li>
                            }
                            @if (page < totalPages)
                            {
                            <li><a style="margin-right: 10px;" class="btn btn-danger btn-pagination" href="?page=@(page+1)">Næste</a></li>
                            }
                        </ul>
                    </div>
                    }
                    }
                </div>
            </div>
        </div>
        }