WP ecommerce braintree and mijireh

I use wp e commerce.
i bought wp e commerce mijireh plug in
i use braintree for processing.

everything is working (page is slurped, working well), however i get the following error after i enter cc info and i hit the buy now button: Whoops! Please fix the problems below:
Order failed: Braintree::AuthorizationError

braintree doc says :You’ll receive an authorization exception if the API key that you’re using is not authorized to perform the attempted action according to the roles assigned to the user who owns the API key. This error can also occur if the data you submitted was malformed – either a parameter isn’t in the allowed list, or it is at the wrong location in the nested parameters.

i entered all four api codes into mijireh (live, not test)
i entered access key into wp e commerce mijireh plug in. (it is showing up as a payment option)

however, I still get the error.

any ideas???

thanks,
Kim