Membership Plugin: Issue With Subscriptions

I'm trying to get the Membership plugin up and running. I am thoroughly confused by how it all works but anyway... here's my issue...

I setup 2 subscriptions..

1) Monthly - Serial - 30 days - $19 (why the heck can't I make it $19.97??)
2) Yearly - Serial - 365 days - $190 (again, let me choose pennies!!)

Anyway... I also setup 2 payment gateways.. AIM and PP Express...

The subscriptions page is missing some stuff... it doesn't show a price... and the AIM button is missing.. the only one there is PP.

Also.. when clicking on the Yearly subscription for PP I get: Invalid Regular period. You must specify valid values for the A3, P3, and T3 parameters for a subscription.

Very frustrated... please help!