Recently active problems in Activision tagged with gaming

Occasionally, the buttons on my guitar, especially the red fret button, don't work. I'll hold it down, but nothing happens. It seems to come back eventually, but it's frustrating. Or, sometimes I'll hold a note down for a long time, but the note will drop out. Is there any way to reset the device, or is it just faulty buttons?

What am I doing wrong???