System.Web.HttpParseException (0x80004005): Unknown server tag 'yale:TransformXml'. ---> System.Web.HttpParseException (0x80004005): Unknown server tag 'yale:TransformXml'. ---> System.Web.HttpException (0x80004005): Unknown server tag 'yale:TransformXml'. at System.Web.UI.TagPrefixTagNameToTypeMapper.System.Web.UI.ITagNameToTypeMapper.GetControlType(String tagName, IDictionary attribs) at System.Web.UI.MainTagNameToTypeMapper.GetControlType(String tagName, IDictionary attribs, Boolean fAllowHtmlTags) at System.Web.UI.RootBuilder.GetChildControlType(String tagName, IDictionary attribs) at System.Web.UI.ControlBuilder.CreateChildBuilder(String filter, String tagName, IDictionary attribs, TemplateParser parser, ControlBuilder parentBuilder, String id, Int32 line, VirtualPath virtualPath, Type& childType, Boolean defaultProperty) at System.Web.UI.TemplateParser.ProcessBeginTag(Match match, String inputText) at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) at System.Web.UI.TemplateParser.ProcessException(Exception ex) at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) at System.Web.UI.TemplateParser.Parse() at System.Web.UI.TemplateParser.ParseTemplateInternal(String content, VirtualPath virtualPath, Boolean ignoreFilter) at System.Web.UI.TemplateParser.ParseControl(String content, VirtualPath virtualPath, Boolean ignoreFilter) at YSM.YM.Web.Views.Component.Code.Page_Load(Object sender, EventArgs e)