EDP Sync with MPC 1000

[John Metzler <jarofjam@mac.com>]

I have my EchoPlex synced to my MPC 1000 with beat clock.  It stays 
locked if I just record one loop and leave it at that.  But what fun is 
that? if I copy that loop to a second loop to add material and then 
switch back to the first loop,   it has strayed.  The beat clock light 
in the bottom right still shows the accurate pulses from the MPC 1000 
but the loop is off as well as the Flashing light that indicates the 
loops beginning.    Any suggestions?  I can't perform live with this 
set up if this is as reliable as it gets.