11Invalid URI: The Authority/Host could not be parsed.System   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at System.Uri..ctor(String uriString)
   at SaleForm.MySaleFormPage.ValidateReturnUrl(String sReturnUrl, String sDefaultIfInvalid)
   at SaleForm.MySaleFormPage.GetLaunchParametersFromRequest(Mode eMode, String& sDataParametersForReturnUrl)
   at SaleForm.LaunchInternet.Page_Load(Object sender, EventArgs e)Void CreateThis(System.String, Boolean, System.UriKind)