RSLogix5000 Motion Servo Axis

Hello everybody,
  I have the following situation:
  I use the MAM function to move a servo axis; It also moves and stops  correctly when the condition before turns flase. The result is actually good, except that sometimes a readjustment takes place (but only disturbs as I said sometimes). I have been sitting in front but didn't notice anything, only the Operator meant that this happens sometimes
  Now I would like to know how this can be stopped. Thank you
  What information do you Need to help me further