[HttpException (0x80004005): Control 'ctl00_ContentPlaceHolder1_txtmodal' of type 'HiddenField' must be placed inside a form tag with runat=server.]
System.Web.UI.Page.VerifyRenderingInServerForm(Control control) +11167438
System.Web.UI.WebControls.HiddenField.Render(HtmlTextWriter writer) +73
ASP.contactus_aspx.__RenderContent1(HtmlTextWriter __w, Control parameterContainer) in c:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\root\e9dea341\f956fa28\App_Web_prcc2mxr.2.cs:0
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter 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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