Emu XL-7 & MP-7 User's Group

It is most likely something I'm missing:

When I work with the MasterArp, it doesn't work till I've checked the
"ARP/Riff don't transmitt" from ArpMenu. But I need to transmitt the Arp's
data, in order to record it to my softsequencer. What am I missing?

Appreciate you help.
 

Kamy