Connecting midi

MIDI out to MIDI in is pretty much it. Then load Session Drummer into a track, create a MIDI track that points to it with the kit as it's MIDI in and that should do it. So long as you ensure everyhting's on the same MIDI channel.

You may or may not need to create a drum map in Sonar or change which pads the kit associates with each note as well to make sure e.g. the kit snare triggers the SD snare.

Some electronic kit brains are better than others in terms of MIDI co-operation and it's worth checking the kit's MIDI spec to make sure it can domwhat you want.

One problem might be latency (the time taken by the DAW to receive and process the MIDI then output the resulting audio. If you can't get it low enough to be comfortable one way round the problem is to play the kit while monitoring it by listening to the kit's audio output, while at the same time recording the drumming as MIDI (not audio) in Sonar. Once the MIDI's recorded you can then point the MIDI track at Session Drummer.