Error When Executing Tests for Project(s)

Hello,

In MS Test, if I click on a class and say execute tests from the context menu, TypeMock works fine. But when I try to run all of my tests in my test project, or try to execute a single test in the project view (there are about 1570 tests), I get this error:

Unit Test Adapter threw exception:
Could not load file or assembly 'Typemock.ArrangeActAssert, Version=6.0.6.0, Culture=neutral, PublicKeyToken=3dae460033b8d8e2' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040).

Any idea why?

Also, if I run tests across multiple projects, it also errors out.

Thanks.