Ive been using the 18T for a month. Love everything about it. Using it tonite to help some friends with a simple show. I want to run two monitor mixes. For some reason i cant get the other out to work. Out 1 is fine any other out when sending signal to the out, it shows a level but i am not getting any output sound. I know its something simple…help. Show is in 3 hours. Thanks.