I suppose it would work if you're using the effects send/return jacks on the board. Or are you using the board as an amp, and running direct? I believe that if you are doing this, you may want to use an A/B box before the looper, so you can have the looper in one channel and your unaltered signal in another channel.
I don't have my mixing console at the house anymore, otherwise I'd try a few combinations for you.