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

i have itvintage pro 128voices with rs7k, i wasnt really using arp, 
but when i tried them to play different arp on each chs, it only 
plays Master on M mode, just 1 preset arps on "ON".. how do i get it 
to play other internal arp pattrens..?(it didn even change when i was 
changing user pattern on arp window..i never had thins problem with 
mp7 but.. this is stressing me out.. any can answer my problem..?
thank you