Amazon Product API ItemLook即使有效,也会返回无效的ItemID

当为ASIN B00281Z86A调用ItemLookup时,我收到一个错误

 B00281Z86A is not a valid value for ItemId. Please change this value and retry your request.

更完整

   
  {"Request":{"IsValid":"True","ItemLookupRequest":{"IdType":"ASIN","ItemId":"B00281Z86A","ResponseGroup":"Medium","VariationPage":"All"},"Errors":{"Error":{"Code":"AWS.InvalidParameterValue","Message":"B00281Z86A is not a valid value for ItemId. Please change this value and retry your request."}

这是一个有效的亚马逊项目,您可以在这里看到http://www.amazon.com/dp/B00281Z86A