I have a similar set up, I've got a Ensoniq SQ80 and a Roland TR-505 drum machine sync'd together for my sequencing needs. However I use the SQ80 as the master and 505 as the slave. I have the SQ80 set to Omni mode-midi out of the SQ80-midi into the 505 and set the 505 to midi sync, hopefully thats what will get you going. If not I'll have to get out the manual and read a bit deeper.
Is the ASR 10 a sequencer too?