Okay this is the response:
array(8) { ["WAENCRYPTEDRETURNUSED"]=> bool(false) ["WAENCRYPTEDRETURNSUCCESS"]=> bool(false) ["eCart1_Items"]=> string(199) "13|WAECART|Beginning Aerial Fabric - Digital Download|WAECART||WAECART||WAECART|0|WAECART|1|WAECART|32.95|WAECART|6|WAECART|0|WAECART|32.95|WAECART|1 Beginning Aerial Fabric - Digital Download (13)" ["WAEC_ContinueRedirect"]=> string(47) "/shop-digital-detail.php?ItemID=13&ItemCateID=6" ["eCart_PPECO_System"]=> string(2) "US" ["PayPal_ECO_Token"]=> string(0) "" ["ECO_Auth_Request"]=> string(1622) "info@aerialdancing.comGCZNDZWDKMUM2DXMAmaGca1e39ivv-6Kp1Es3HEF1HDmAku8oYl2Yb7ylUzMrIkIcJOqPPFJ63.0http://aerialdancing.com/pp_confirm.phphttp://aerialdancing.com/pp_cancel.phpSoleBillingAuthorization
32.9532.95Beginning Aerial Fabric - Digital Download32.95113Authorization" ["ECO_Auth_Result"]=> string(2060) "2013-09-05T17:39:52ZFailurebce6292e28ec7Security errorSecurity header is not valid10002Error63.07560199" }
Warning: require_once(WA_eCart/Adv_CO_Scripts/PP_ECO_Authorize_PHP.php): failed to open stream: No such file or directory in /home/aerialda/public_html/pp_checkout_failure.php on line 24
Fatal error: require_once(): Failed opening required 'WA_eCart/Adv_CO_Scripts/PP_ECO_Authorize_PHP.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/aerialda/public_html/pp_checkout_failure.php on line 24