Paypal new API Error

[matoen]

Hey,

i am setting up a german virtuemart shop wit Joomla 1.5.22 und jetzt neu VM 1.1.8.

I would like to use the new paypal api for creditcard payment and paypal payment. if i use the paypal payment i get the following error:

Error: Error - Paypal did not complete the transaction. Please try again in a little while.
Error: Failure in Processing the Payment (ps_paypal_api)

I am not sure about the configuaratin. do i need to set up a own payment method for the creditcard or is the credit card included in the paypal new api module?

anyone an idea?

Thanks for your help.