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error when launching game

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I am trying to launch a game that was created with SlimDX.  I should say that I am not a developer.  I am getting the following error when launching the game:

SlimDX.DirectInput.DirectInputException: REGDB_E_CLASSNOTREG: Class not
registered (-2147221164)
   at SlimDX.Result.Throw[T](Object dataKey, Object dataValue)
   at SlimDX.Result.Record[T](Int32 hr, Boolean failed, Object dataKey, Object
   at SlimDX.DirectInput.Device..ctor(DirectInput directInput, Guid subsystem)
   at SlimDX.DirectInput.Mouse..ctor(DirectInput directInput)
   at RR.GameEngine.InitializeInput()
   at RR.GameEngine.Initialize()
   at RR.GameEngine.Run()
   at RR.main.main()


This is a specialized game designed for blind users.  I have contacted the developer and he is unsure what is causing this error.  Since I am blind, I do not have a mouse connected.  Is this error resulting from not having a mouse on the system?

The system is a Windows 8.1 desktop machine.

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Looking at the stack trace it does seem that the error is occuring when the program is trying to initialize the mouse.  Do you have a mouse you can borrow to see if that is the issue as it looks like it is to me.

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