You may need to increase the intensity to feel a stronger stimulation.
To increase the toning intensity, go to the 'Tone' screen, start your toning session and move the toning intensity circle upwards. The higher you slide the circle, the more you will feel the toning intensity increase. You can move the circle back down to decrease the intensity level.
You can also use the buttons on your Connect controller:
press the + button to increase and the – button to decrease the intensity