0,0: Generator (Event=32)
1,0: MCE Event (Event=230, Delay Secs=1)
2,0: MCE Event (Event=x, Delay Secs=y, Initial Delay=0, [AddAnotherParameterInJcsDotIni]=1)
0,1: Belt Right
1,1: Belt Left

x: Warp ID
y: Number of coins needed

You'll also need another warp event somewhere in the level requiring the same number of coins so the sprite will get loaded, though it doesn't need to have ShowAnim set to 1. At a guess, the part that's tripping you up is that you need to add another parameter to MCE Event, since its bitfield doesn't stretch far enough to set ShowAnim otherwise.