How to get certain pages when using routing webpages

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VB

ASP.NET

routing

All pages work correctly with routing but when selecting a menuitem (in masterpage) to go a page, it does not go to the selected page. When I enter product page with path localhost:3806/yarrow/Products/35 then click on home menuitem, it gives me this path localhost:3806/yarrow/Products/Default.aspx but correct path is localhost:3806/yarrow/Default.aspx. How to fix it please?

My sample code

Sub RegisterRoutes(routes As System.Web.Routing.RouteCollection)
    routes.MapPageRoute("", "{DesignerID}", "~/PDesigners.aspx")
    routes.MapPageRoute("", "Products/{ProductID}", "~/Product.aspx")
End Sub

Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
    ' Code that runs on application startup
    RegisterRoutes(System.Web.Routing.RouteTable.Routes)
End Sub

This code in my user control to get id dynamically

<a href='<%# GetRouteUrl("",new with {.ProductID=Eval("ProductID")})%>' class="product-image">
           <img src='UploadedImages/Products/big/<%# EVAL("PictureID")%>' alt='<%# Eval("ProductTitle") %>'
               width="165" height="161" />
       <asp:Label ID="ProductImageLabel" runat="server" Text='<%# Eval("PictureID") %>' Visible="false" />
       </a>