SetExpressCheckout failed: Array
(
    [TIMESTAMP] => 2010%2d07%2d31T07%3a30%3a01Z
    [CORRELATIONID] => accd888dd6904
    [ACK] => Failure
    [VERSION] => 52%2e0
    [BUILD] => 1421734
    [L_ERRORCODE0] => 10400
    [L_SHORTMESSAGE0] => Transaction%20refused%20because%20of%20an%20invalid%20argument%2e%20See%20additional%20error%20messages%20for%20details%2e
    [L_LONGMESSAGE0] => Order%20total%20is%20missing%2e
    [L_SEVERITYCODE0] => Error
)