I've added my paypal details in the event config. panel

I've added my paypal details in the event config. panel and added my event + price and I do not see paypal as an option to checkout. How do I set it up to activate paypal? In the meantime, I've linked my event to my online store for reg.

Help.
Thanks,
stephey baker
(web designer for KimbelryMarooney.com)