PayPal Shopping cart not holding price amount with Market Press

Hello,

I have a price set up as $5.00 in the store settings. It works in Sandbox but when I go “Live” and try to purchase something – it shows up in PayPal as 0.

I have phoned PayPal and they say I need to create the buttons thru them. But isn’t that why I am using the MarketPress Plugin?

Thank you

Eileen