youtubeapi:上传不起作用

我需要一些帮助。我尝试用youtube api上传一个视频。我在c#中使用windows窗体。这就是我所做的：

var service = new YouTubeService("kslmfkmlskf",this._sharedConfiguration.youtubeApiKey);
service.setUserCredentials(this._sharedConfiguration.youtubeUserName, this._sharedConfiguration.youtubeUserPassword);
var newEntry = new YouTubeEntry();
string title = "test";
string description = "test test test";
string keywords = "testa testb testc";
newEntry.Media = new Google.GData.YouTube.MediaGroup();
newEntry.Media.Categories.Add(new MediaCategory("Movies", YouTubeNameTable.CategorySchema));
newEntry.Media.Keywords = new MediaKeywords(keywords);
newEntry.Media.Description = new MediaDescription(description);
newEntry.Media.Title = new MediaTitle(title); 
newEntry.MediaSource = new MediaFileSource("E:''cine_buzz''automate_trailer''toupload''demo.mov", "video/quicktime");
var createEntry = new YouTubeEntry();
createEntry = service.Upload(newEntry); 

我有一个像这样的异常返回：

{Google.GData.Client.GDataRequestException: Execution of request failed: https://uploads.gdata.youtube.com/feeds/api/users/default/uploads ---> System.Net.WebException: Le serveur distant a retourné une erreur : (400) Demande incorrecte.
à System.Net.HttpWebRequest.GetResponse()
à Google.GData.Client.GDataRequest.Execute()
--- Fin de la trace de la pile d'exception interne ---
à Google.GData.Client.GDataRequest.Execute()
à Google.GData.Client.GDataGAuthRequest.Execute(Int32 retryCounter)
à Google.GData.Client.GDataGAuthRequest.Execute()
à Google.GData.Client.MediaService.EntrySend(Uri feedUri, AtomBase baseEntry, GDataRequestType type, AsyncSendData data)
à Google.GData.Client.Service.Insert(Uri feedUri, AtomEntry newEntry, AsyncSendData data)
à Google.GData.Client.Service.Insert[TEntry](Uri feedUri, TEntry entry)
à Google.GData.YouTube.YouTubeService.Upload(String userName, YouTubeEntry entry)
à Google.GData.YouTube.YouTubeService.Upload(YouTubeEntry entry)
à CineBuzzAutomateTrailer.frmUploadYoutube.upload() dans C:'Users'Yeurl'Documents'Visual Studio 2010'Projects'CineBuzzAutomateTrailer'CineBuzzAutomateTrailer'frmUploadYoutube.cs:ligne 105
à CineBuzzAutomateTrailer.frmUploadYoutube.btnTest_Click(Object sender, EventArgs e) dans C:'Users'Yeurl'Documents'Visual Studio 2010'Projects'CineBuzzAutomateTrailer'CineBuzzAutomateTrailer'frmUploadYoutube.cs:ligne 113
à System.Windows.Forms.Control.OnClick(EventArgs e)
à System.Windows.Forms.Button.OnClick(EventArgs e)
à System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
à System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
à System.Windows.Forms.Control.WndProc(Message& m)
à System.Windows.Forms.ButtonBase.WndProc(Message& m)
à System.Windows.Forms.Button.WndProc(Message& m)
à System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
à System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
à System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
à System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
à System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
à System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
à System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
à System.Windows.Forms.Application.Run(Form mainForm)
à CineBuzzAutomateTrailer.Program.Main() dans C:'Users'Yeurl'Documents'Visual Studio 2010'Projects'CineBuzzAutomateTrailer'CineBuzzAutomateTrailer'Program.cs:ligne 18
à System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
à System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
à Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
à System.Threading.ThreadHelper.ThreadStart_Context(Object state)
à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
à System.Threading.ThreadHelper.ThreadStart()}

和这个

<errors xmlns="http://schemas.google.com/g/2005">
- <error>
    <domain>GData</domain> 
      <code>InvalidEntryException</code> 
        <internalReason>Validation failed</internalReason> 
  </error>
</errors>

我不明白我的工作出了什么问题。感谢的帮助