Payment problems in Marketpress Lite

Hello!

I’m trying out Marketpress Lite and unfortunately I’ve come across some problems.

First problem is to setup payment methods. I’ve decided to try PayPal Express Checkout. I’ve filled in all my API details that I’ve got from my PayPal account. When I try to make a test order and get to the part when I can choose between the two options I’ve got (“Manual” and “PayPal”) I get this message from clicking “PayPal” :

“There was a problem connecting to PayPal to setup your purchase. Please try again.”

Any suggestions how to fix this?

Next question is if it is possible to add other payment solutions even thought I’ve just got Marketpress Lite. I would really like to add the ordinary PayPal functions (so customers don’t need to log in to PayPal to pay as I understand is required in PayPal Express Checkout). Can I do this manually?

I also need to add other payment solutions, with special descriptions and an extra fee. I have no idea how to do this!

Thank you so much for reading and hopefully helping me out!