Reply to Audio Set Up and Cue

What am I doing wrong? I am using the VCI100SE with a Lexicon Omega and am having problems hearing the nex track using cue. After reading on the community and waching Ean's videos again I believe the reason it won't let me hear to cue through the headphones is due to not being able to sellect more than one set of audio outputs at a time. I can do monitor but it won't let me do booth at the simultaneously.
Thanks,
---Ed