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

I have a problem and if I can't fix it my xl7 will be worthless to me so please help.
My brother and I are in the same band he is on a 'Electribe ER-1' and I'm on the 'xl7'. My 
brother is the drummer and the 'Electribe ER-1' is the master so he controls the tempo(BPM). 
My xl7 is the slave. so far so good. He controls start/stop and sets the tempo.
My problem is that when I want to record something in realtime, the midi data from the 
'Electribe ER-1' is recorded too. The er-1 is on channel 16. I'm not using channel 16. 
Rechannelize input is set to off. Enable midi for channel 16 is set to off. But still it is 
recording the mididata from the 'Electribe ER-1'.
After a day work and 3 times reading the manual we could not fix this. Please help!

EMU xl7 version 2.0