Rules Scheduler options not appearing in Rules Sets

Hi!

I am pretty new to rules.
What a great module!
Is helping me to solve quite issues I had for a webiste workflow, so many thanks to you!

I have a question... I want to create a Scheduled Rule Set to happen once a day, in certain time, to publish and unpublish certain content types, and also send some notifications.
So, I can set up the necessary rules from Administer / Rule Sets, but once I've donde so, I need to set up a Schedule to do it.

Right now, I'm not able to see how to do that in Rule Sets, I think I am missing something...

I have rules-6.x-1.x-dev over Drupal 6.10.

Could anyone give me a hand to figure out what's going on?

Thanks on advance!