how to test across conditions ?

Dear all

sorry to re-start this discussion. I posted on 15.01. but unfortunately had no reply

I have 6 sessions (of resting) per subject

I want to test session 1 versus session 2 etc...

how can I set up this contrast in CONN ?
I can only see how I can do participant 1 versus participant 2 etc..
but NOT how to do session 1 versus session 2 

thank you very much for your help !

Sven