Klarna Checkout error

[DMT]

It seems that there is a bug in Klarna Checkout payment module in VirtueMart 2.0.26d. After going live with Klarna Checkout (with a valid EID and password), I only get this error message: An error occurred with the payment Klarna Checkout. Please choose another payment method

It seems that Klarna Checkout only works in test mode, not live.
Anyone else who have the same problem?

Joomla: 2.5.19
Virtuemart: 2.0.26d