Colorsource 40 faders inoperative in channel mode

Our new colorsource 40 has gotten into a mode where the faders are unresponsive in channel mode.  I can turn up channels by selecting them and using either the keypad (e.g., 1 thru 15 at 50 enter) or using the wheel, but not by using the faders.  The console in in complete rather than simple mode.  I used to be able to touch "channels 1-40" and grab a fader, but this no longer works.  Similarly with playbacks.

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