Hello. On a fresh install of 4.9.1, the first thing I tried to do was uncheck Enable AJAX under Host Settings, as I discovered a bug with aspdotnetstorefront that required this to be unchecked. However, when I cleick Update, I got the following error, which is repeatable: A critical error has occurred. Object reference not set to an instance of an object. The Event Viewer shows the following: AssemblyVersion: 04.09.01 PortalID: 0 PortalName: Nature's Avenger Organic Herbicide | Weed Killer | Natural Bed Bug Killer | Natural Bug & Insect Killer UserID: 1 UserName: NAOHost ActiveTabID: 16 ActiveTabName: Host Settings RawURL: /Host/Host Settings/tabid/16/portalid/0/Default.aspx AbsoluteURL: /Default.aspx AbsoluteURLReferrer: http://74.86.198.214/Host/Host%20Settings/tabid/16/portalid/0/Default.aspx UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/1.0.154.53 Safari/525.19 DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: 1d20eca2-a23c-40bf-85a7-4f95409c6984 InnerException: Object reference not set to an instance of an object. FileName: FileLineNumber: 0 FileColumnNumber: 0 Method: System.Web.UI.PageRequestManager.ProcessUpdatePanels StackTrace: Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at System.Web.UI.PageRequestManager.ProcessUpdatePanels() at System.Web.UI.PageRequestManager.RenderPageCallback(HtmlTextWriter writer, Control pageControl) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Page.Render(HtmlTextWriter writer) at DotNetNuke.Framework.PageBase.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace --- Source: Server Name: DNPWEB2-TX2

p.s. Good luck with those weeds .

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 Thanks so much for the help! it's too bad the the aspdotnetstorefront has a glitch that requires this to be turned off. The Re-Order link in order history won't function if it is on. They have it logged in their support queue. In the mean time, if I have AJAX turned off, an IE7 browser shows the "Done, but with Errors on the Page" icon at the bottom right of the page. I don't want it to look like my web site is buggy, but as stated ADNSF won't work correctly with it on, so it's a catch-22. :-)