Logic Express And Delta 44 Monitoring Options

[pubdoggy]

I have what I believe to be a very simple problem. I am using Logic Express with a Delta 44. Outputs 1 & 2 are going to my speakers and all I want to do is send outputs 3 & 4 to my headphones so that I can monitor what I am recording at the same time. How do I achieve this?

Many thanks

S