Net framework software installed, but problems with the use of

I downloaded a random number, the corresponding figures for the emergence of the English pronunciation.
Require net framework, but the use of a problem:
for error:

call about real-time (JIT) debugging instead of this For more information dialog box,
See this at the end of the news.
************** Abnormal text **************
System.Runtime.InteropServices.COMException (0x80045039):abnormal from HRESULT:0x80045039
in SpeechLib.ISpeechObjectTokens.Item (Int32 Index)
in SpeechNumber.SpeechObject.SetEnglishVoice ()
in SpeechNumber.Form1 .btnNewNumber_Click (Object sender, EventArgs e)
in System.Windows.Forms.Control.OnClick (EventArgs e)
in System.Windows.Forms.Button.OnClick (EventArgs e)
in System.Windows .Forms.Button.OnMouseUp (MouseEventArgs mevent)
in System.Windows.Forms.Control.WmMouseUp (Message & m, MouseButtons button, Int32 clicks)
in System.Windows.Forms.Control.WndProc (Message & m)
in System.Windows.Forms.ButtonBase.WndProc (Message & m)
in System.Windows.Forms.Button.WndProc (Message & m)
in System.Windows.Forms.Control.ControlNativeWindow.OnMessage ( Message & m)
in System.Windows.Forms.Control.ControlNativeWindow.WndProc (Message & m)
in System.Windows.Forms.NativeWindow.Callback (IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam

back too long, not to write.
how to solve?