I am using S1 Pro 3.5 on an iMac. I have EZ Drummer 2 and a Roland SDP-30 Octapad for controlling EZ Drummer. I have set up the Octapad as an external device and it shows connected. After setting up the Octapad it controls EZ Drummer stand alone just fine but when I open EZ Drummer inside of Studio One I get nothing. Again, the Octapad shows up in S1 as connected and I have the EZ Drummer track activated to record but there is no response from the pads on the Octapad. My keyboard controls EZ Drummer just fine in S1. What am I missing? Thanks!