OBERHEIM SYNTH

Is there anybody out there who could tell me how it works to sequence
analogue synth with the back CV and gate outputs?
It is possible for me to play with my OBXa (using the DSX) some other
synth. but if I use the recorded sequences I could only play the OBXA
and no other synth. I activated any button that could fulfill my wish
(as read in the manual) but nothing happens. It could only be a small
mistake but I couldn�t find it.