短信服务使用新的OpenAPI Explorer ，新的SDK直接引用 ，还把签名有问题？

用了新的     OpenAPI Explorer 方法，直接复制代码，然后项目引用 新的core.dll   

为什么还返回：      {"Recommend":"https://error-center.aliyun.com/status/search?Keyword=SignatureDoesNotMatch&source=PopGw","Message":"Specified signature is not matched with our calculation. server string to sign is:POST&%2F&AccessKeyId%3DLTAI4TXYnYrYx2aM%26Action%3DSendSms%26Format%3DJSON%26PhoneNumbers%3D13686035355%26RegionId%3Ddefault%26SignName%3D%25E6%25B3%25A8%25E5%2586%258C%25E9%25AA%258C%25E8%25AF%2581%26SignatureMethod%3DHMAC-SHA1%26SignatureNonce%3Db73b9728-847a-4473-87e7-2a5325c9406e%26SignatureVersion%3D1.0%26TemplateCode%3DSMS_71225598%26TemplateParam%3D%257B%2527VerifCode%2527%253A%25271111%2527%252C%2527Timeout%2527%253A%25272%2527%257D%26Timestamp%3D2019-03-22T08%253A51%253A24Z%26Version%3D2017-05-25","RequestId":"1173F629-FC3A-463D-938A-25F3C7D37B35","HostId":"dysmsapi.aliyuncs.com","Code":"SignatureDoesNotMatch"}