新增收款个人用户API 中，微信返回的总是签名系统错误，是这个接口现在无法使用嘛？

<xml><appid>xx</appid><business>101</business><mch_id>xx</mch_id><merchant_detailaddress>zw</merchant_detailaddress><merchant_gbaddress>210600</merchant_gbaddress><merchant_name>test</merchant_name><merchant_remark>001</merchant_remark><recipient_idcardno>xx</recipient_idcardno><recipient_name>zw</recipient_name><recipient_wechatid>xx</recipient_wechatid><sign><![CDATA[46112C3EF53084ECA3CC0EECA8419743]]></sign></xml>