I am assuming it is too many laptops on an access point. This environment has 24 laptops on a cart used in 1 room so shouldn't the controler divy them up between the 2 antennas in the 1142 which is sitting right above them?
I think the user experience would improve greatly if
you deployed the 1140 series AP
With the greater bandwidth available with "N" 24 users
wouldn't be as problematic.You may still get the alarm
depending on the threshold you have set.