ListView to display ProductList

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C#

ASP.NET

SQL

Hi,
I am trying to display different products from my db by the category number. The problem is that I can get all the products but I can't get specific products for certain category.
The following error is throw when I try to see the Products from the Category 'Accessories'.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
Requested URL: /ProductsList.aspx

<asp:ListView ID="ListView_ProductsMenu" runat="server" 
                DataKeyNames="CategoryID" DataSourceID="EDS_Category_Menu">
                <emptydatatemplate>No Menu Items.</emptydatatemplate>
                <itemseparatortemplate></itemseparatortemplate>
                <itemtemplate>
                    <li>
                    <a href="<%# VirtualPathUtility.ToAbsolute("~/ProductsList.aspx?CategoryId=" + Eval("CategoryID")) %>"><%# Eval("CategoryName") %></a>
                    </li>
                </itemtemplate>               
                <layouttemplate>
                    <ul ID="itemPlaceholderContainer"  runat="server" style="font-family: Verdana, Arial, Helvetica, sans-serif;">
                        <li  runat="server" id="itemPlaceholder" />
                    
                    <div style="text-align: left;background-color: #FFCC66;font-family: Verdana, Arial, Helvetica, sans-serif;color: #333333;"></div>
                </layouttemplate>
            
            <asp:EntityDataSource ID="EDS_Category_Menu" runat="server" EnableFlattening="False" 
                                  ConnectionString="name=OnlineRetailStoreEntities" DefaultContainerName="OnlineRetailStoreEntities" EntitySetName="Categories">