64bit window7 system.badimageformatexception

[GoogleCodeExporter]

What steps will reproduce the problem?
1. revit2012
2. windows 7 64-bit
3. .net 4.5 sdk

What is the expected output? What do you see instead?
i saw:
revit cannot run the external application "RevitPythonShell" contact the 
provider for assistance. Information they provided to Revit about their 
Identity:.

system.BadImageFormatException

could not load file or assembly 'file:///d:\Program 
Files(x86)\RevitPythonShell2012\RevitPythonShell.dll' or one of its 
dependencies. this assembly is built by a runtime newer than the currently 
loaded runtime and cannot be loaded.

What version of the product are you using? On what operating system?
python shell 2012 install exe. on windows 7 64-bit

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 16 Feb 2013 at 11:19