Unknown Error:

[Jehanne]

Here is the message I get now probably something simple i overlooked but My brain is not working any help?

Unknown Error:
Object reference not set to an instance of an object.
at WindowsApplication7.Form1.DownloadExtras()
at WindowsApplication7.Form1.DoUpdates()
at WindowsApplication7.Form1.pxUpdate_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)