Roland A-49

[dhmmidi]

Hi,I just got a Roland A-49 Keyboard .I can not figure out how to change midi channels so i can record in to my MC80.
I have the manual.
Manual says Press Function ,then midi channel .....not working.(Function button lit and not lit same result )
I also tryed pressing Enter after midi channel selection...not working.

What is the exact procedure to change midi channels ?

I'm greatful for any Help ,
Thank you in advance.
Regards,dhmmidi