Create paypal recurring subscription

-- HikaShop version -- : 4.4.3
-- HikaSerial version -- : 4.0.0

Hello,

I have a membership subscription where the initial price is $100 and the renewal price is different, $90.

So reading the documentation, you have to setup 2 products:
- product A of $100, where I set plan relation type to 'creation'
- product B of $90, where I set plan relation type of 'renew'

Added and configured the Hikaserial paypal recurring payment plugin.

The issue I am having now, is when purchasing the product A in the front end, the paypal recurring plugin does not show. Is it not possible to creating a paypal subscription when the initial and renewal prices are different?

Thanks