Visual studio 类型或命名空间名称'；门户'；命名空间中不存在'；微软动态'；（是否缺少程序集引用？

从EP创建新时间表时，我遇到以下错误

Message: An unhandled error has occurred. To view details about this error, enable debugging in the web.config file or view the Windows event logs. 

Source: App_Web_tstimesheetentrypage.ascx.91f2996b.w9xwqj0v 

例外情况详情：

对象引用未设置为对象的实例

at TSTimesheetEntryPage.Page_Load(Object sender, EventArgs e) in c:\Program Files\Common Files\microsoft shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ep\TSTimesheetEntryPage.ascx.cs:line 120
at System.EventHandler.Invoke(Object sender, EventArgs e)
at AxBaseUserControl.OnLoad(EventArgs e) in c:\Program Files\Common Files\microsoft shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ep\AxBaseUserControl.ascx.cs:line 173
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean `enter code here`includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

在尝试按下此按钮时，我执行了以下操作：

1）在VS2013中，我创建了一个新的Ax EP WebApplication项目，并将

\Web\Web Files\Web Controls\TSTimesheetEntryPage

添加到该项目中。这又为该项目添加了4个从属文件 3） 构建解决方案

现在我得到了编译器错误：

Error 1 The type or namespace name 'Portal' does not exist in the namespace 'Microsoft.Dynamics' (are you missing an assembly reference?) 
Error 2 The type or namespace name 'EPFormAction' could not be found (are you missing a using directive or an assembly reference?) 

我试图通过右击我的项目选择Add Ep Proxy project，将

eApplication Proxy

和

TSTimesheetProxies

添加到项目中来解决这些错误。但是，编译器开始抱怨类型重复

'Microsoft.Dynamics.Portal.Application.Proxy.TSTimesheetLine' exists in both 'c:\Users\lawrence\AppData\Local\Temp\Microsoft Dynamics AX\C Sharp Projects\EPApplicationProxies\bin\Debug\EPApplicationProxies.dll' and 'c:\Users\lawrence\AppData\Local\Temp\Microsoft Dynamics AX\C Sharp Projects\TSTimesheetProxies\bin\Debug\TSTimesheetProxies.dll'    c:\users\lawrence.ntow\documents\visual studio 2013\Projects\debugTimesheet\debugTimesheet\TSTimesheetEntryPage.ascx.cs     22  debugTimesheet

任何帮助都将不胜感激