Moving around a camera

Greetings, oh blender people.
I have a camera moving around a circle path but it’s only moving for one cycle for 100 frames, then nothing. How can I make it do more rounds? I tried raising the path length but it did nothing at all. I guess I have to do something in the IPO? Any ideas??
Thanx in advance! (even though i get no answer, lol)

EDIT: I figured out how to do it (with the speed curve) but is it possible to make the curve more soft?

go to ipo curve editor for that camera. select all the curves and then under curves select ‘cyclical’- it should automatically loop the action ad infinitum