PayPal Express checkout: How to enable Digital Goods

Long story-- but i tried using the paypal pro widget, but it turns out that i need an actual paypal pro account to get that one to work- i am trying paypal express, but i get this error message when i test it:

[PayPal Express Error]

-An error has occurred. Please contact form administrator for assistance.

[Transaction refused because of an invalid argument. See additional error messages for details.]

-You are not signed up to accept payment for digitally delivered goods.

Help?

You need to open a Express Checkout and have the Digital Goods option delivered

Please follow the instructions here:

http://www.jotform.com/help/285-Configuring-PayPal-Express-Integration