Hi, I can't use this payment method, always gives error:

Array
(
[TIMESTAMP] => 2013-04-11T22:50:50Z
[CORRELATIONID] => 852f1fgfg67e4ab
[ACK] => Failure
[VERSION] => 76.0
[BUILD] => 5650305
[L_ERRORCODE0] => 10501
[L_SHORTMESSAGE0] => Invalid Configuration
[L_LONGMESSAGE0] => This transaction cannot be processed due to an invalid merchant configuration.
[L_SEVERITYCODE0] => Error
[AMT] => 12.00
[CURRENCYCODE] => USD
)

The account is Business type, and have the API signature, username and password. Also have the WPS payment working about right.

This is not working anymore or need something extra?

Thanks for readme.