namespace eller class eller type

Hej!

Jeg har stirret mig helt kold på den her fejl, er der nogen som har godt forslag?

Compiler Error Message: CS0138: A using namespace directive can only be applied to namespaces; 'ZZZIT.ZZZITLib' is a type not a namespace.

Yderligere fejlkode:
Line 6:  <%@ Import Namespace="ZZZIT" %>
Line 7:  <%@ Import Namespace="ZZZIT.EISClass" %>
Line 8:  <%@ Import Namespace="ZZZIT.ZZZITLib" %>
Line 9:  <%@ Register Src="~/controls/PageHeader.ascx" TagName="PageHeader" TagPrefix="uc1" %>
Line 10: <asp:Content ID="Content1" ContentPlaceHolderID="cphSubMaster" runat="Server">

Sidekoden:
<%@ Page Language="C#" AutoEventWireup="false" CodeFile="CustomerSearch.aspx.cs" Inherits="CustomerSearch"
    CodeFileBaseClass="ZZZIT.Page" MasterPageFile="~/masters/default/main.master"
    RuntimeMasterPageFile="ThreeColumn.master"  %>

<%@ Import Namespace="System.Configuration.ConfigurationManager" %>
<%@ Import Namespace="ZZZIT" %>
<%@ Import Namespace="ZZZIT.EISClass" %>
<%@ Import Namespace="ZZZIT.ZZZITLib" %>
<%@ Register Src="~/controls/PageHeader.ascx" TagName="PageHeader" TagPrefix="uc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="cphSubMaster" runat="Server">
    <div class="AccountPage">
        <uc1:PageHeader ID="PageHeader1" runat="server" Text="LABEL"
            EnableTheming="true" />
             
        <form id="form1" runat="server">
        <asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
       
        <asp:LinkButton ID="LinkButton1" runat="server" PostBackUrl="customers.aspx">LinkButton</asp:LinkButton>
       
        </form>
    </div>
</asp:Content>

Kodefilen:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class CustomerSearch : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
}