Microsoft.Xna.Framework apparently missing

I'm trying to run any of the simulations for robotics studio 1.5 with XP x64 edition, and I keep getting this error message:

System.TypeInitialisationException: The type initialiser for 'Dss.Transforms.TransformSimulationEngine.Transforms' threw an exception. > System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Xna.Framework, Version=1.0.0.0, Culture=neutral,PublicKeyToken=6d5c3888ef60e27d' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.Xna.Framework, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6d5c3888ef60e27d' at Dss.Transforms.TransformSimulationEngine.Transforms.Register()

Can anybody help me with this problem?

I've tried reinstalling Xna to no avail, and I'm getting frustrated - I need this program to work for a University assignment.

[882 byte] By [MasseyStudent] at [2008-1-10]
# 1

The latest XNA release claims that it works on 64-bit windows but we have been unable to make it load properly. We hit the same error that you have reported. I'll take this up with the XNA team but in the meantime, you will want to run the simulator on 32-bit windows.

-Kyle

KyleJ-MSFT at 2007-10-3 > top of Msdn Tech,Microsoft Robotics Studio,Microsoft Robotics - Simulation...
# 2
Since the Robotics Studio claims that it works on 64-bit computer, why can't the simulator run on it?
Or do we have other choice to make it possible to work on 64-bit, like linking 32-bit library on 64-bit computer?
Does anyone have any ideas? Many thanks.
lizi at 2007-10-3 > top of Msdn Tech,Microsoft Robotics Studio,Microsoft Robotics - Simulation...

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