When I touch a sound spot there is no response.

Check that the PENpal is switched on. If yes, it most probably needs a boost charge. Charge for 1.5 hours and try again. You charge by connecting the USB cable to the pen and then to a PC or Mac. The computer will charge the pen in a maximum of 1.5 hours. If you connect to a wall plug with a USB adaptor, the charging time is 1 hour. 1 hour's charge will keep the pen going on our continuous run testing system for at least 3 hours at the rate of one sound syllable spoken 50 times per minute - i.e. you will be touching a sound spot over and over again 50 times a minute for at least 3 hours! In the unlikely event that the pen is still not working, please contact us on 0208 44 55 123, (or 0044208 4455123 when calling from outside the UK) and ask for tech support, or email: info@mantralingua.com