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我發送以下請求到PayPal：貝寶錯誤10413 - 購物車中物品的數量不符合訂單的總計金額
USER=APIUSERNAME&
PWD=APIPASSWORD&
SIGNATURE=APISIGNATURE&
METHOD=SetExpressCheckout&
VERSION=204&
PAYMENTREQUEST_0_PAYMENTACTION=SALE&
PAYMENTREQUEST_0_AMT=1.11&
PAYMENTREQUEST_0_CURRENCYCODE=EUR&
PAYMENTREQUEST_0_CUSTOM=148&
PAYMENTREQUEST_0_DESC=PayPal+Express+Checkout&
PAYMENTREQUEST_0_INVNUM=145001530&
RETURNURL=returnurl&
CANCELURL=cancelurl&
EMAIL=email%40live.nl&
PAYMENTREQUEST_0_SHIPTONAME=Testperson-nl+Approved&
PAYMENTREQUEST_0_SHIPTOSTREET=Neherkade+1XI&
PAYMENTREQUEST_0_SHIPTOCITY=Gravenhage&
PAYMENTREQUEST_0_SHIPTOZIP=2521VA&
PAYMENTREQUEST_0_SHIPTOCOUNTRYCODE=NL&
PAYMENTREQUEST_0_SHIPTOPHONENUM=0612345678&
L_PAYMENTREQUEST_0_NAME0=Jackie+O+Round+Sunglasses&
L_PAYMENTREQUEST_0_AMT0=1.11&
L_PAYMENTREQUEST_0_NUMBER0=ace001&
L_PAYMENTREQUEST_0_QTY0=1&
L_PAYMENTREQUEST_0_TAXAMT0=0.19&
PAYMENTREQUEST_0_TAXAMT=0.19
但是由於某種原因，我得到以下信息：
L_ERRORCODE0 = 10413 & L_SHORTMESSAGE0 =由於參數無效而拒絕交易。詳細信息請參閱其他錯誤消息。 & L_LONGMESSAGE0 =購物車項目總金額與訂單金額不匹配。
我嘗試了許多不同的配置（添加項目數量，無稅等）。 那麼，任何人都可以幫助我知道我做錯了什麼？