Mine was 100% plug and play.
Try playing around there to see if modifying the settings will allow the system to see the grabber. It should also show up under the Remote control section if the systems sees it.
I could absolutely kiss you right now, this has made my YEAR. I've had these damn LED's sitting on the back of my TV for A FULL YEAR because for the life of me I just couldn't make it work and I just got so damn frustrated and now it just WORKS! Thank you thank you thank you