By the way parts catcher is out of the way turret one is on station no2 and turret two on station no21.I will appreciate your help very much.
Well since you do have the turret indexed correctly..that being turret #2 parked at Tool #21...(or Turret parked at Tool #1, if setting a rear tool)...
The presetter is controlled by hydraulic pressure..so there is a valve next to the ones that control the chuck and tail stock pressure...maybe someone has turned it down so low that it there is not enough pressure to drive the presetter..
You would also have to be in either "Handle, Jog or Rapid" mode.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)