There can be a few things that are causing this behavior. First, if you have the trial version then this is expected behavior from our controls. They will not be recognized in the trial version. If this is not the case, it is possible that there are missing references. Did you install VS2015 after you installed our control? If so then try to reinstall it and it should up.
Please let me know if I can assist you further.
many thanks for your response.
No, i have no trial version.
When you expand your references in the Coded UI Test project do you see Infragistics4.Win.CodedUITest.UIA.VS14.v16.1? What references show up for you there?