Sampletank 2.x in SONAR X3--Isn't loading

I had MC6T and just got SONAR X3. They both have Sampletank included. After installing X3, I uninstalled MC6. Don't know if that is relevant or not, but when I tried (for the first time) to insert Sampletank into a project, it would not load. I am told by X3 that it isn't available or is not installed properly.
 
Any words of advice or should I just get SampleTank Free again? Frankly, I don't know what version 2.x is, so figure I don't want to miss out on anything.