We are now working on Mission 4, and are having a weird problem with the audio sensor. If I start up scratch and use commands to move the robot, it works. If I use commands to report the audio sensor value, it also works. But, after I have read a value from the audio sensor, none of the commands to move the robot do anything anymore. So, for example, the sample programs that move the robot after the audio sensor value is high enough don’t work, because they move the robot after reading the sensor value. Opening a new program doesn’t restore the motion, but quitting Scratch and then restarting it does. Also, we didn’t have this problem with the light sensor from Mission 3. Any ideas about what could be going on or how to fix it?