Paypal Express Checkout

Hi expert,

If i checkout using paypal express as payment method, at the last page after click confirm, it bring me back to step 2.

then i found the error code in the admin.

2014-07-21 10:54:25 - PayPal Express debug (Call data): {"METHOD":"SetExpressCheckout","MAXAMT":"0.00","RETURNURL":"http:\/\/www.test.com\/index.php?route=payment\/pp_express\/checkoutReturn","CANCELURL":"http:\/\/www.test.com\/index.php?route=checkout\/checkout","REQCONFIRMSHIPPING":0,"NOSHIPPING":1,"LOCALECODE":"EN","LANDINGPAGE":"Login","HDRIMG":null,"HDRBORDERCOLOR":"","HDRBACKCOLOR":"","PAYFLOWCOLOR":"","CHANNELTYPE":"Merchant","ALLOWNOTE":"0","PAYMENTREQUEST_0_SHIPPINGAMT":"","PAYMENTREQUEST_0_CURRENCYCODE":"MYR","PAYMENTREQUEST_0_PAYMENTACTION":"Sale","L_PAYMENTREQUEST_0_DESC0":"Design:Mc Fries, Phone Model:iPhone 4 & 4S","L_PAYMENTREQUEST_0_NAME0":"Moschino Mc Donald's Phone Case","L_PAYMENTREQUEST_0_NUMBER0":"A0014","L_PAYMENTREQUEST_0_AMT0":"29.00","L_PAYMENTREQUEST_0_QTY0":1,"L_PAYMENTREQUEST_0_ITEMURL0":"http:\/\/www.test.com\/Moschino-Mc-Donalds-Phone-Case","L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE0":"0.00","L_PAYMENTREQUEST_0_ITEMWEIGHTUNIT0":"kg","L_PAYMENTREQUEST_0_DESC1":"Car Manufacturer:Porsche","L_PAYMENTREQUEST_0_NAME1":"Non Slip Pad","L_PAYMENTREQUEST_0_NUMBER1":"K3000","L_PAYMENTREQUEST_0_AMT1":"25.00","L_PAYMENTREQUEST_0_QTY1":1,"L_PAYMENTREQUEST_0_ITEMURL1":"http:\/\/www.test.com\/non-slip-pad","L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE1":"0.00","L_PAYMENTREQUEST_0_ITEMWEIGHTUNIT1":"kg","L_PAYMENTREQUEST_0_NUMBER2":"discount_by_payment","L_PAYMENTREQUEST_0_NAME2":"Credit Card Merchant Fee (5%)","L_PAYMENTREQUEST_0_AMT2":"2.70","L_PAYMENTREQUEST_0_QTY2":1,"PAYMENTREQUEST_0_ITEMAMT":"56.70","PAYMENTREQUEST_0_AMT":"56.70"}
2014-07-21 10:54:27 - PayPal Express debug (Result): "TIMESTAMP=2014%2d07%2d21T10%3a54%3a27Z&CORRELATIONID=27229f095c158&ACK=Failure&VERSION=65%2e2&BUILD=11843215&L_ERRORCODE0=10002&L_SHORTMESSAGE0=Security%20error&L_LONGMESSAGE0=Security%20header%20is%20not%20valid&L_SEVERITYCODE0=Error"

anyone ?

I have the same problem, any advice?

Same issue here. Have you solve it?

Any update on this lads?
I have same issue.