SR16 hook up to sequencer

[mutt]

I'm trying to get my SR16 to work with the sequencer in my Yamaha sy77. When I hook it up to use channel 16 to make drum patterns, it won't record what I'm playing on the sr16, but just plays whatever pattern is currently called up. I was wondering if the sy77 can tell the sr16 what pattern to play and when?
All the sr16 manual says is that you can do it but I don't see where it tells you how.

HELP!!