Fender Stratocaster Guitar Ps3 Playstation 3 Harmonix Rockband Controller.

I have tried this guitar and it just doesn’t seem to want to connect to the dongle! I put new batteries in and still didn’t have any luck. When the sync button is held down I can see the red light turns on where the ps button is but I was not successful with the connection. It comes with the strap. It’s in good condition other then not connecting.