Could not load file or assembly 'Microsoft.TeamFoundation.WorkItemTracking.Controls, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

I want to open some test case use TFS, but on “CP Platform Scenario” tab -> Scenario Class , occurs "Could not load file or assembly 'Microsoft.TeamFoundation.WorkItemTracking.Controls, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified."