Typemock integration with custom VS2005 addin

Hi all,
I'm writing a custom VS2005 addin to execute my tests, but I found the following problem. Whenever a test method is executed, I received the following error:

*** Typemock Isolator needs to be linked with Coverage Tool to run, to enable do one of the following:
   1. link the Coverage tool through the Typemock Isolator Configuration
   2. run tests via TMockRunner.exe -link
   3. use TypeMockStart tasks for MSBuild or NAnt with Link 
For more information consult the documentation (see Code Coverage with Typemock Isolator topic)
   at TypeMock.MockManager.Init(Boolean collectAllCalls)
   at TypeMock.MockManager.e(Type A_0)
   at TypeMock.MockManager.Mock(Type type, Constructor mockConstructors)
   at TypeMock.MockManager.Mock(Type type)
   at TestExample.Class1.Test()

Please note that Typemock Isolator (v4.3.1) is enabled. What is required in order to properly activate TypeMock?

Thanks