Setting up an animation with fryrender

Hi,

I've been trying Fryrender for still renders but wanted to try one the "cool features" that is Day cycle animation. And I cannot get it to work. I set my output configuration to full animation range, set up my sun system and define a time step and check the outpu rgp box in the render menu. And... tadaaaa... nothing happens but a single frame. There's something I am doing wrong I guess... but FR user manual is not really helpful...
Any idea on how to set up a Day cycle animation? (best would be a test file !)

Thank you