解决方法:
将template/default/controls/ForumNews.ascx模板文件的代码改为:
<%@ Import Namespace="DXBBS.Components"%>
<%@ Control Language="C#" AutoEventWireup="true"%>
<asp:PlaceHolder ID="ShowNews" Visible="false" runat="server">
<marquee scrollamount="4" onmouseover="this.stop()" onmouseout="this.start()">
<asp:DataList RepeatDirection="horizontal" RepeatLayout="Flow" ID="ForumNews" runat="server">
<itemtemplate>
<a href="NewsView.aspx?BoardID=<%= Requests.GetIntQueryString("BoardID") %>&ID=<%# Eval("ID") %>" target="_blank"><%# Eval("Title") %></a>
</itemtemplate>
</asp:DataList>
</marquee>
</asp:PlaceHolder>