Problem with Paypal Express Checkout

[张良]

Hi there,

  I was redirected to Paypal when the first time i click the link
/control/setPayPalCheckout after I added some items into the cart,  and I
returned back to the website without finished the payment on Paypal. Then i
failed to be redirected to Paypal again after I clicked the link
/control/setPayPalCheckout  again.

  I don't know much about the Paypal express checkout, but I found a way to
resovle this problem. I'm not sure if it's the correct way. Does anyone have
ideas about this?

  There are 3 lines in PayPalServices.java from 111 to 113:
        if (UtilValidate.isNotEmpty(token)) {
            encoder.add("TOKEN", token);
        }

  The problem went away after I commented out those 3 lines. Any helps on
this will be appreciated.

  Regards,

Liang Zhang