Khi đăng nhập máy toàn báo như thế này:
Server Error in '/VSTPortfolio' Application.

The remote server returned an error: (404) Not Found.

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.Net.WebException: The remote server returned an error: (404) Not Found.

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:

[WebException: The remote server returned an error: (404) Not Found.]
System.Net.HttpWebRequest.GetResponse() +5314029
vietstock.framework.UI.HttpReader.GetUnicodeRespon se(String strUrl, ContentEncoding encoder) +231
vietstock.framework.UI.HttpReader.Render(HtmlTextW riter output) +68
System.Web.UI.Control.RenderControlInternal(HtmlTe xtWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWrite r writer) +19
System.Web.UI.HtmlControls.HtmlForm.RenderChildren (HtmlTextWriter writer) +163
System.Web.UI.HtmlControls.HtmlContainerControl.Re nder(HtmlTextWriter writer) +32
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTex tWriter output) +51
System.Web.UI.Control.RenderControlInternal(HtmlTe xtWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.HtmlControls.HtmlForm.RenderControl( HtmlTextWriter writer) +40
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWrite r writer) +19
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTe xtWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlT extWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWrite r writer) +19
System.Web.UI.Page.Render(HtmlTextWriter writer) +29
System.Web.UI.Control.RenderControlInternal(HtmlTe xtWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266

Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082