You are running 64 bit application with TypeMock.NET 32 bit

The error you are getting is incorrect, we should fix it.
The error you are supposed to get is:

TypeMock.NET is not enabled, to enable do one of the following:
1. run 'mocking_on.bat' before running the tests
2. run tests via TMockRunner.exe
3. use TypeMockStart tasks for MSBuild or NAnt
4. set Tools->Enable TypeMock.NET from within Visual Studio
For more information consult the documentation (see Running topic)

In any case make sure that the TypeMock reference is to the correct version

- I'm running from VS.NET 2005.
- I'm showing "Diable TypeMock.NET" in "Tools" menu which I assume means that's it's currently enabled.
- I'm running via csUnit VS.NET Addin (which I hope is the same as running NUnit addin).

- I have also tried executing the following statement from the folder where test files are (including TypeMock.dll and full absolute paths everywhere)

"....TMockRunner.exe" "....csUnitCmd.exe" /assembly:....Tests.dll"

here's what I got from that:

Starting to execute tests...

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'TypeMock, Version=0.0.0.0, Culture=neutral, PublicKeyToken=0000000000000000' or one of its dependencies. The system cannot find the file specified.
File name: 'TypeMock, Version=0.0.0.0, Culture=neutral, PublicKeyToken=0000000000000000'
   at csUnit.Interfaces.AssemblyEventArgs..ctor(String assemblyFullName, String assemblyPathFileName)
   at csUnit.Core.Loader.ThreadProc()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Please try the following:
1. Open the GAC (WindowsAssembly) and tell me what versions of TypeMock are installed
2. Run the command line TMockRunner –logPath=<somePath> …
Send me the *.log files created in that path (I have sent you the e-mail address)

sent

I am getting the same problem in my machine.
Please let me know if you have found a solution to this problem.

Please make sure that you have enables TypeMock.
here are some ways to do it:
1. using TMockRunner.
2. using NAnt/MSBuild tasks
3. using the Visual Studio Addin - remember to restart the test process.

This is fixed in version 3.6