Are you using a replacement, click-y strumbar? Just wondering.
Nope. That's the Woodstrat. The Strat that's made out of a real Strat body and neck and bridge / tuners. It came with a clicky strum for some reason.
https://www.youtube.com/watch?v=2FJL-lqO3Cw
You also have to turn the Start knob to engage it. the Back knob is a pushbutton.