c#-4.0 - Outlook オブジェクトの作成エラー

Question

Windows 7 x64 マシン上の Visual Studio 2010 で Outlook 2010 と統合しようとすると、次のエラーが発生します。

System.Runtime.InteropServices.COMException was unhandled by user code
  Message=Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).
  Source=mscorlib
  ErrorCode=-2146959355
  StackTrace:
       at System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType objectType)
       at System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(RuntimeType serverType)
       at System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(RuntimeType serverType, Object[] props, Boolean bNewObj)
       at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
       at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
       at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
       at System.Activator.CreateInstance(Type type, Boolean nonPublic)
       at System.Activator.CreateInstance(Type type)
       at SpatialExcelAddIn.MapBrowserUI.AddAttachment() in C:\Userdata\Projects2010\ExcelAddin\ExcelAddin-branch\UIandExcelLayer\MapBrowserUI.cs:line 105
       at SpatialExcelAddIn.MapBrowserUI.emailToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Userdata\Projects2010\ExcelAddin\ExcelAddin-branch\UIandExcelLayer\MapBrowserUI.cs:line 86
       at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
       at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
       at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
       at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
       at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
       at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
       at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at System.Windows.Forms.ToolStrip.WndProc(Message& m)
       at System.Windows.Forms.MenuStrip.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  InnerException: 

Outlook バージョン 14 コンポーネントへの参照を追加し、次のコードを使用しています。

OL.Application app = 新しい OL.Application(); <-- これによりエラーが発生します

Outlook が実行されているときにのみ発生します。Outlook アプリケーションを停止してコードを再度実行すると、問題なく動作します。

、ご意見をお聞かせください！