Analogue-sequencer

I've changed the studio en rebuilded all audio and midi paths and  
cables and now I have again a weird problem with syncing the P3 to  
midiclock.

This time it is attached directly to the AMT8, where a MPC4000 feeds  
it with midiclock (on all 8 channels).

Hitting start on the MPC will start the P3, but changing the speed on  
the MPC won't change the speed on the P3 (it runs it's internally set  
tempo).

The same cable attached to the Andromeda or V-synth:

changing the speed on the MPC changes the speed of the arp from the  
Andro of V-synth.

????

Midicable is only 2 meters long...

Colin, any ideas?

Boele