Guitar Rig 4 problem.

Is Guitar Rig 4 no longer part of the Sonar FX collection?   Did I miss something?
 
I have been using Guitar Rig 4 in its Sonar version since it first shipped with Sonar (X1 I think).   I've been using it through X2 and X3 but today I tried to open it on an older project track (it was inserted some time ago) and it told me it was a demo version of GR4 and I had to activate it. 
I duly opened the service centre and put in the serial number I got with X1 (the only one I have).  It accepted the serial number and said 'all products activated' but when I went back to the project it just did the same as before, said it was a demo and asked me to activate.  Tried again, same result.  
Tried reinstalling from the Native Instruments site with restarts etc.     Then tried reinstalling the update from the X3 bundle but still the problem persists – it only opens as a demo version and asks me to activate (or buy the full version).  I notice it's not mentioned in the Platinum lists in the command centre.
 
I'd be grateful for any advice.  I did a forum search but found nothing.    Thanks.

Guitar Rig 4 hasn't been part of SONAR for some time. This is something you may need to work out with NI. Note that you'll need the 1.1 update.

+1 to Bob's advice. GR4 LE was bundled with SONAR X1, and I forget now how I initially activated it. I am pretty sure I activated it initially in Stand-alone mode, and that I explicitly launched it as administrator when I did (allows programs to make required registry changes).
 
After that point, I would recommend closing and reopening SONAR (just to free all memory it is using), then go into Preferences->File->VST Settings and under Scan options, check both Rescan failed and existing plugins... manually scan ("SCAN" button) and when finished, uncheck the two rescan options and Apply/OK out (you do not want to leave those two checkboxes enabled as this is a one-time thing).
 
If NI says all things are activated, you may simply need to do the rescan mentioned above.