When I click on the Configuration -> Advance - App Parameters I get this in version 9
Server Error in '/' Application.
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Cannot have multiple items selected in a DropDownList.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Cannot have multiple items selected in a DropDownList.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[HttpException (0x80004005): Cannot have multiple items selected in a DropDownList.]
System.Web.UI.WebControls.DropDownList.VerifyMulti Select() +124
System.Web.UI.WebControls.ListControl.RenderConten ts(HtmlTextWriter writer) +10842421
System.Web.UI.WebControls.WebControl.Render(HtmlTe xtWriter writer) +42
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.HtmlControls.HtmlContainerControl.Re nder(HtmlTextWriter writer) +42
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.HtmlControls.HtmlTableRow.RenderChil dren(HtmlTextWriter writer) +57
System.Web.UI.HtmlControls.HtmlContainerControl.Re nder(HtmlTextWriter writer) +42
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.UpdatePanel.RenderChildren(HtmlTextW riter writer) +288
System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) +53
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.WebControls.WebControl.RenderContent s(HtmlTextWriter writer) +13
System.Web.UI.WebControls.WebControl.Render(HtmlTe xtWriter writer) +42
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.HtmlControls.HtmlForm.RenderChildren (HtmlTextWriter writer) +253
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTex tWriter output) +87
System.Web.UI.HtmlControls.HtmlForm.RenderControl( HtmlTextWriter writer) +53
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +240
System.Web.UI.Page.Render(HtmlTextWriter writer) +38
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4240
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Version Information: Microsoft .NET Framework Version:2.0.50727.4200; ASP.NET Version:2.0.50727.4016
Anyone know the solution to this?