What are you trying to do, sync the akai to protools or protools to the akai? Either way, you have to set up one as master and one as slave. The master generates the MTC and the slave resolves it. It's pretty straight-forward.
In protools you go to: setup menu -> peripherals -> synchronization tab -> midi input for sync
On the Akai MPC: Tempo/Sync button (60/60ii/3000 series) or Midi/Sync (2000 series)